Expand
$(2 a+3 b)^{2}$
$4 a^{2}+12 a b+9 b^{2}$
$\left(\frac{x}{2}+\frac{2 y}{3}-\frac{3 z}{4}\right)^{2}$
Factorise the following:
$9 y^{2}-66 y z+121 z^{2}$
The following expressions are polynomials? Justify your answer:
$8$
Factorise
$6 x^{3}-23 x^{2}+29 x-12$
Zero of the polynomial $p(x)=2 x+5$ is
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