For polynomial $p(x)=x^{3}-3 x^{2}+8 x+12$, $p(-1)=\ldots \ldots \ldots$
$1$
$0$
$2$
$3$
If $x+2$ is a factor of $x^{3}+a x^{2}-x+30,$ find the value of $a$.
Factorise
$49 x^{2}-42 x+9$
The degree of polynomial $7 x^{5}-4 x^{4}+2\left(x^{3}\right)^{2}-x^{2}+35$ is $\ldots \ldots \ldots$
Find the value of
$x^{3}+y^{3}-12 x y+64,$ when $x+y=-4$
Evaluate
$205 \times 195$
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