Question

Help please

Answer 1

rationalize the denominator

Answer 2

All you need to do to rationalize the denominator is to multiply both the numerator and the denominator by sqrt5. This is okay because sqrt5/sqrt5 is = to 1.
So: 8/3sqrt5 * (sqrt5/sqrt5)= 8sqrt5/15
sqrt5*sqrt5 cancels the square root, so it becomes 3*5.

Answer 3

careful..

Answer 4

the denominator is \(\sqrt[3] 5\) NOT \(\sqrt 5\)

Answer 5

Oh lol... then I guess you would have to multiply the denominator by the square root of 5 twice, as it's a cube root and not a square root.
So: