Question

How do you simplify `x^3+(5x^2-6x-1)x+7x^2`?

Answer 1

`color(purple)(=> 6x^3 + x^2 - x`

Explanation:

#x^3 + (5x^2 - 6x - 1)x + 7x^2

`=> x^3 + 5x^3 - 6x^2 - x + 7x^2, "removing bracket"`

`=> x^3 + 5x^3 + 7x^2 - 6x^2 - x, " bringing like terms together"`

`color(purple)(=> 6x^3 + x^2 - x`