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Problem in image. Explain it too.

Problem in image. Explain it too.-example-1
User Cwadding
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√(40) = 6.32\\\\\\or\\5√(15) \\\\

this is because when 40 is broken down into two numbers (one divisible to get out of the square root, and one not) you get 25 + 15 under the square root. we know that the square root of 25 is 5, so we can put 5 outside the root and leave 15 inside.

-------------- try the next problem, and if you don't understand, please reply back.

answer is for a)
5√(15)

User Brutus
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