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$(2 x+3 y+5)^{2}$
$4 x^{2}+9 y^{2}+25+12 x y+30 y+20 x$
If $49 x^{2}-b=\left(7 x+\frac{1}{2}\right)\left(7 x-\frac{1}{2}\right),$ then the value of $b$ is
If $(5 x-3)^{2}=25 x^{2}+k x+9,$ then find $k$
Evaluate
$205 \times 195$
The value of the polynomial $5 x-4 x^{2}+3,$ when $x=-1$ is
From the following polynomials find out which of them has $(x+1)$ as a factor
$6 x^{3}+11 x^{2}-5 x-12$
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