Question

Is -2 a solution to 4x^(3)-x^(2)+16x-4

Answer 1

Not a solution

Explanation:

In order for
`x=-2` to be a solution, the result after substituting must be 0:

`4(-2)^3-(-2)^2+16(-2)-4\stackrel{?}{=}0`

`4(-8)-4-32-4\stackrel{?}{=}0`

`-32-40\stackrel{?}{=}0`

`-72\\eq0`

Therefore,
`x=-2` is not a solution to
`4x^3-x^2+16x-4`