Factorise $: x^{3}+x^{2}-26 x+24$
Factorise
$x^{2}+4 y^{2}+25 z^{2}+4 x y-20 y z-10 z x$
By using the factor theorem, show that $(x+2)$ is a factor of the polynomial $6 x^{3}+19 x^{2}+16 x+4$ and then factorise $6 x^{3}+19 x^{2}+16 x+4$
Expand
$(2 x+5 y)^{2}$
Expand the following:
$(4 a-b+2 c)^{2}$