Question

(x^2-3x)(x^2-3x-1)-20

Factorise

Answer 1

Answer:

The factorisation is done below:

Pls. check it out

Step-by-step explanation:

Let,

x^2 - 3x = y

(y)(y - 1) - 20

y^2 - y - 20

(y - 5)(y + 4)

(x^2 - 3x - 5)(x^ - 3x + 4)