Q&A for How to Multiply Square Roots

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We are not allowed to use a calculator, so how do I multiply a whole number by a square root?

Community Answer

When you multiply a whole number by a square root, you just put the two together, with the whole number in front of the square root. For example, 2 * (square root of 3) = 2(square root of 3). If the square root has a whole number in front of it, multiply the whole numbers together. So 2 * 4(square root of 3) = 8(square root of 3).

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What is 2 root 3 times root 3?

Donagan

Top Answerer

√3 times √3 equals 3. Two times that is 6.

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What is 4 divided by square root of 5?

Community Answer

(4√5)/5. Since radicals are not supposed to be in the denominator, you multiply by √5/√5 to get (4√5)/5.

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Question

What is 5 times the square root of 2?

Community Answer

Generally we write 5√2 or calculate the square root of 2, which is 1.414, and then multiply it by 5. The answer would be 7.07.

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How do I simplify the square root of (5+7) squared?

Community Answer

The square root and the square cancel each other out, so the final answer is 5+7, which is 12.

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Question

What is 2 times 2, root 2?

Michael Carter

Community Answer

It would be 2 x 2sqrt2 = 4sqrt2, this is the simplest form and cant be reduced any further.

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Question

What is the square root of 6?

Community Answer

It's an irrational number, which you could round to 2.45. Usually you would just use a calculator to find such a square root.

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What is the square root of 3 times -1?

Community Answer

When multiplying an integer by a square root, you simply place the integer in front of the radical sign. So -1 x √3 is expressed as -1√3. You can use a calculator to find the exact product.

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Question

What is sqr -4 times sqr -9? Is it -6 or 6?

Donagan

Top Answerer

-6.

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Question

How do you multiply a whole number with a square root?

Community Answer

You simply place the whole number in front of the radical sign. For example, 2 x √2 would simply be expressed as 2√2. You can use a calculator to find the exact product.

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Question

What is the square root of 2 times the square root of 12?

Community Answer

The answer is 2√3. First, it would be written as √(2√12). Then, after simplification it would become √(2√3×4)=√(4√3), √4=2, 2√3.

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How do I square root a square root?

Donagan

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The square root of the square root of a number is equal to the fourth root of that number.

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Question

Can I multiply a number with a root? E.g. 2.16 root 6?

Donagan

Top Answerer

Yes. (2)(16√6) = 32√6.

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What is 20 root 3 times root 2?

Community Answer

20 root 6. There is an imaginary one in front of the root symbol, so root 2 = 1 root 2. First multiply the numbers outside the root symbol. 20 times 1 is 20. Then you multiply the numbers inside the root symbol. 2 times 3 is 6. You can't simplify root 6, so your answer is 20 root 6.

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If I have one number under the square root and the other is not, how do I multiply it?

Community Answer

Leave the number outside the square root alone, and multiply the root number.

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What is root 2 multiplied by 5 root 2?

Community Answer

The answer is 10. Since you have sqrt 2 multiplying by sqrt 2, that turns into sqrt 4, which is simplified as 2. So that would be 5 * 2, which is equal to 10.

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Question

What is (√3)(3 - √3)?

Donagan

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(√3)(3 - √3) = 3√3 -(√3)(√3) = 3√3 - 3.

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Question

What happens when the first square root doesn't have a number in front of it, but the second number does?

Community Answer

You leave the number outside of the square root alone, and you multiply the square roots. Then, you simplify your square root to the lowest it can be, and if it gives an integer, multiply the two. If it gives a square root again, just put the number that was originally outside next to your new square root.

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Question

What is (2 - √2) x (2 + √2)?

Donagan

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(2 - √2)(2 + √2) = 4 +2√2 - 2√2 - 2 = 4 - 2 = 2.

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What is 5 root 3 multiplied by root 27?

Community Answer

5 sqrt 3 x sqrt 27 = 5 sqrt 3 x sqrt (9 x 3) = 5 sqrt 3 x 3 sqrt 3 = 15 sqrt (3 x 3) = 15 x 3= 45.

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Question

How do you find the square root of 149?

I_l1ke_gam3s

Community Answer

See Calculate a Square Root by Hand or use a calculator to find the result. Its exact value is 12.21.

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What is the square of -4 times the square of -9?

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(-4)²(-9)² = (16)(81) = 1296. (The square of a negative number is a positive number.)

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Question

What is root 3 times 2 root 2?

Community Answer

(√3)(2√2) = 2√[(3)(2)] = 2√6. Leave it like that or further evaluate it: 2√6 = (2)(2.45) = 4.9.

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What is the square root of √36?

Community Answer

√36 = 6. √(√36) = √6 = 2.45.

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What is root 2 times root 3?

Community Answer

(√2)(√3) = √[(2)(3)] = √6.

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Question

What is (√2 - 2)²? Please explain with steps.

Community Answer

(√2 - 2)² = (√2 - 2)(√2 - 2) = (√2)(√2) - 2√2 - 2√2 + 4 = (2) - 4√2 + 4 = 6 - 4√2. You can leave the answer in that form, or you could evaluate √2 as 1.414. Then 6 - 4√2 = 6 - 4(1.414) = 6 - (5.656) = 0.344. You could also evaluate √2 at the beginning and then evaluate (√2 - 2)², which would yield the same answer.

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What is 9 times the square root of 3?

Community Answer

9√3 = (9)(1.732) = 15.59.

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What is the square root of 39?

Community Answer

6.245.

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Question

What is three square root two times two?

Community Answer

If you're asking about (2)(3√2), it's 6√2.

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What is the square root of 2, multiplied by 1?

Community Answer

The square root of 2. Anything multiplied by one is itself.

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