Factors of $x^{2}-23 x+120$ are.........
$(x-20)(x-6)$
$(x-40)(x-3)$
$(x-15)(x-8)$
$(x-24)(x-5)$
Find the value of the polynomial $x^{2}-7 x+12$ at.
$x=-2$
Factorise
$144 x^{2}-289 y^{2}$
Factorise
$25 x^{2}+25 x+6$
Examine whether $2 x+3$ is a factor of $2 x^{3}+21 x^{2}+67 x+60$ or not.
Evaluate
$205 \times 195$