Question

factor -2x^6-6x^5+56x^4=

Answer 1

\[-2 x^4 (x^2+3 x-28) \]

Answer 2

\[-2x^4(x-4)(x+7)\]

Answer 3

First thing is that this looks complicated, so find the biggest thing you can factor out.
Each term has a -2x^4 in common, so pull that out

(-2x^4) (x^2 +3x -28)
Now you can factor the second expression
(-2x^4) ( x+7)(x-4)