Question

factorise( x^2 - 3 x )^2 - 8 x * ( x ^2 - 3 x ) - 20..​

Answer 1

Let (x^2-3x) = a

a^2-8ax-20=0

-8a+root of 64a^2+80=0/2

4a+2 root of 4a^2+5