Question

Rationalize the denomiantor.

Answer 1

@agent0smith

Answer 2

\(\bf \cfrac{-x^3}{{\color{blue}{ \sqrt{7x+3}}}}\cdot \cfrac{{\color{blue}{ \sqrt{7x+3}}}}{{\color{blue}{ \sqrt{7x+3}}}}\implies \cfrac{-x^3\sqrt{7x+3}}{(\sqrt{7x+3})^2}\)

what do you think?

Answer 3

the idea being, to get rid of the radical at the bottom, you simply multiply both top and bottom by the bottom
thus squaring the bottom, and thus getting the radicand out

Answer 4

Holy jesus this is why i hate math xD

Answer 5

well, jesus loves math btw, so -> http://www.slwc.org/uploads/jesusmath_MPG.jpg

Answer 6

http://3.bp.blogspot.com/_DLOgigeajNo/RxLccuxMWeI/AAAAAAAAAes/iZU3H4bv9lk/s1600-h/jesusdivision.jpg <--- told ya