Question

-60x^9+15x^7=0

Answer 1

can you factor out some common factors?

Answer 2

like a first step factoriz out - 15x^7 than will get -15x^7(4x^2 -1)=0
so but you see that inside parentheses there are (a^2 -b^2) = (a-b)(a+b)

so in this case will get -15x^7(2x -1)(2x+1) =0

hope this will help you