Question

Middle Term Factorisation (x²-4x)(x²-4x-1)-20​

Answer 1

Answer:

−4x)(x

2

−4x−1)−20

let (x²−4x)=P

P(P−1)−20

P²−P−20

P²−5P+4P−20

P(P−5)+4(P−5)

(P+4)(P−5)

put P=x

2

−4x

(x²−4x+4)(x²−4x−5)

(x−2)

2

(x+1)(x−5)