Find the value of the polynomial $x^{2}-7 x+12$ at.
$x=1$
Factorise the following:
$8 p^{3}+\frac{12}{5} p^{2}+\frac{6}{25} p+\frac{1}{125}$
If $a+b+c=5$ and $a b+b c+c a=10,$ then prove that $a^{3}+b^{3}+c^{3}-3 a b c=-25.$
Factorise
$25 x^{2}+25 x+6$
Expand
$(x+4)(x+9)$