How do you simplify $7/(3+ sqrt7)$ ?

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Answer 1 · 2016-03-14T17:58:09

See the explanation

Using $(a^2-b^2)=(a+b)(a-b)$

Multiply by 1 but in the form of $1=(3-sqrt(7))/(3-sqrt(7))$

$7/(3+sqrt(7))xx(3-sqrt(7))/(3-sqrt(7))$

$= (7(3-sqrt(7)))/(3^2-7)$

$(7(3-sqrt(7)))/(9-7)$

I will let you finish this off

Hope it helps!

How do you simplify 7/(3+ sqrt7)7/(3+ sqrt7)?