Factorise
$49 x^{2}-42 x+9$
$=(7 x)^{2}-2(7 x)(3)+(3)^{2}$
$=(7 x-3)^{2}$
$=(7 x-3)(7 x-3)$
Classify the following as a constant, linear,quadratic and cubic polynomials:
$1+x+x^{2}$
With the help of the remainder theorem, find the remainder when the polynomial $x^{3}+x^{2}-26 x+24$ is divided by each of the following divisors
$x-1$
Expand
$(a-2 b+7 c)^{2}$
$(x-2 y)^{3}+(2 y-3 z)^{3}+(3 z-x)^{3}$
$x^{3}+8 x^{2}+9 x-18$
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