Polynomials question bank (Maths)

Verify whether the following are zeroes of the polynomial indicated against them:
$p(x) = (x + 1)(x - 2)$,$x = -1, 2$

Divide $p(x)$ by $g(x)$,where $p(x) = x + 3x^2 - 1$ and $g(x) = 1 + x$.