Is $x+1$ is a factor of $4 x^{3}+7 x^{2}-2 x-5$ or not ?

From the following polynomials find out which of them has $(x+1)$ as a factor

$6 x^{3}+11 x^{2}-5 x-12$

Expand the following:

$(3 a-2 b)^{3}$

Factorise the following quadratic polynomials by splitting the middle term

$15 x^{2}+7 x-2$

Factorise :

$2 x^{2}-7 x-15$

Check whether $p(x)$ is a multiple of $g(x)$ or not, where

$p(x)=x^{3}-x+1, \quad g(x)=2-3 x$