Question

How do you factor `7x+28x^2-35x^3`?

Answer 1

`-7x(5x+1)(x-1)`

Explanation:

`7x+28x^2-35x^3` => factor GCF:

Note that dividing by `-7x` makes a positive `x^2` term.

`-7x(5x^2-4x-1)`
`-7x(5x^2-5x+x-1)`
`-7x[5x(x-1)+(x-1)]`
`-7x(x-1)(5x+1)`