Question

Need help with this denominator rationalization.

Answer 1

\[\Large \frac{7x^4}{\sqrt{2x - 8}} \implies \frac{7x^4}{\sqrt{2x - 8}} \times \frac{\sqrt{2x - 8}}{\sqrt{2x-8}}\]
does that help?

Answer 2

where do i go from there?

Answer 3

i understand what you did though

Answer 4

you multiply

Answer 5

like ordinary rationalziation

Answer 6

for example \[\large \frac{2}{\sqrt 2} \times \frac{\sqrt 2}{\sqrt 2} \implies \frac{2\sqrt 2}{2} \implies \sqrt 2\]