Factorise the following quadratic polynomials by splitting the middle term
$x^{2}+10 x+16$
$(x+2)(x+8)$
Expand
$\left(\frac{2 x}{3}+\frac{3 y}{4}\right)^{2}$
Find the zero of the polynomial in each of the following cases
$p(t)=7 t-21$
$6 x^{2}+7 x-20$
Factorise
$x^{2}+4 y^{2}+25 z^{2}+4 x y-20 y z-10 z x$
Dividing $x^{3}+125$ by $(x-5),$ the remainder is $\ldots \ldots \ldots .$
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