$4 x^{2}-20 x+25=(\ldots \ldots \ldots)^{2}$
$x+5$
$x-5$
$2 x-5$
$2 x+5$
Find the value of $a$, if $x-a$ is a factor of $x^{3}-a x^{2}+2 x+a-1$.
Expand the following:
$(3 a-2 b)^{3}$
One of the factors of $\left(25 x^{2}-1\right)+(1+5 x)^{2}$ is
Multiply $x^{2}+4 y^{2}+z^{2}+2 x y+x z-2 y z$ by $(-z+x-2 y)$
For what value of $m$ is $x^{3}-2 m x^{2}+16$ divisible by $x+2 ?$
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