Question

Algebra 2: Rationalize the Denominator.
-5x^2 over root 7x+9

Answer 1

\[(\frac{ -5^2 }{ \sqrt{7x+9} }\]

Answer 2

is it that

Answer 3

yes

Answer 4

top is -5^2 which is just 5 squared or 25 do you follow?

Answer 5

wait is the root for the 7x only or the whole thing

Answer 6

The whole thing

Answer 7

to rationalise, multiply the original denominator by its conjugate
so if the original was a-b, multiply it by a+b