factor x^2/7 out of the expression x^5/7-x^2/7

2 answers

well,
x^5 = x^2 * x^3
so that should get you started...
what confuses you here ?

suppose we just had x^5 - x^2
wouldn't that just be :
x^2( x^3 - 1) ???

so now you have x^(5/7) - x^(2/7)
= x^(2/7) (x^(3/7) - 1)