Write the following cubes in expanded form
$(7 x-4 y)^{3}$
Factorise
$25 x^{2}+25 x+6$
Write the coefficient of $x^{2}$ in the following polynomials
$\pi x^{2}-\frac{22}{7} x+3.14$
Find the quotient and the remainder when $2 x^{2}-7 x-15$ is divided by
$x+1$
Find the value of the polynomial $x^{2}-7 x+12$ at.
$x=1$