Rewrite the expression using rational exponents.

Step-by-step explanation:

when taking the radical of a number its really just a fractioned exponent for example =

This is because in the radical the x has an exponent of 1 and since its the square root the radical is to the 2nd so you take the exponent of the X and put that of the what ever kind of radial you have such as a square root third root fourth root and so on...

in your case you would take X's exponent of 8 and since your taking the cube root would put the 8 over the 3.

hope that helped

-2

7 - 9 = -2

reversed:

-2 + 9 = 7

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.