Question

Simplify the following expression.
(√15+√7)(√15+√7)
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Answer 1

Step-by-step explanation:

3√12×√7√15

=3×7×√12×√15

=21×√12×√15

=21×√4×√9×√5

=21×2×3×√5

=126√5

hopefully this will help you

Answer 2

2{11+2(root105)}

This is nothing but

${( \sqrt{15} + \sqrt{7})}^{2}$

Using (a + b)^2 formula, we get,

(root15)^2 + (root7)^2 + 2(root15)(root7)

= 15 + 7 + 2(root105)

= 2{11+2(root105)}

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