SOLUTION: 8x^3-27=0 2x^3+54=0 4x^3-32=0 64^3-1=0

Algebra ->  Exponents -> SOLUTION: 8x^3-27=0 2x^3+54=0 4x^3-32=0 64^3-1=0      Log On


   

Question 945226: 8x^3-27=0



2x^3+54=0


4x^3-32=0


64^3-1=0
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
These are sum and differences of cubes which can be factored using these formulas,
u%5E3%2Bv%5E3=%28u%2Bv%29%28u%5E2-uv%2Bv%5E2%29
u%5E3-v%5E3=%28u-v%29%28u%5E2%2Buv%2Bv%5E2%29
So just substitute into the appropriate formula.
I'll do one.
You do the rest.
8x%5E3-27=0
u=2x
v=3
8x%5E3-27=0
%282x-3%29%284x%5E2%2B6x%2B9%29=0