Please help stuck on this question! evaluate show your work.

asked Jun 18, 2019 24.2k views

1 vote

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3 votes

You need to make use of the distributive property, along with ...

$√(a)\cdot√(b)=√(ab)\\√(a)\cdot√(a)=a\qquad\text{meaning of square root}$

Then

$√(7x)\left(√(x)-7√(7)\right)=√(7x)\cdot√(x)-7√(7x)\cdot√(7)\\\\=√(7)√(x)√(x)-7√(7^2x)=x√(7)-7\cdot 7√(x)\\\\=x√(7)-49√(x)$

Yellowgray answered Jun 23, 2019

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