Factorise

$x^{3}-11 x^{2}+20 x+32$

Expand

$\left(\frac{2 x}{3}+\frac{3 y}{4}\right)^{2}$

Evaluate

$(421)^{2}$

Evaluate

$(153)^{2}$

Divide $p(x)=21+10 x+x^{2}$ by $g(x)=2+x$ and find the quotient and the remainder.

The zero of polynomial $p(x)=b x+m$ is $\ldots \ldots \ldots$