Question

(x² - 4x) ( x² - 4x - 1 ) - 20​

Answer 1

Answer:

see attachment figure

Step-by-step explanation:

Find:- (x² - 4x) (x² - 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 = x² - 4x

(x² - 4x + 4) (x² - 4x - 5)

(x - 2)² (x + 1) (x - 5)

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