Question

Factorise ➡️

(a² - 2a)² - 23(a² - 2a) + 120
__!

Answer 1

Step-by-step explanation:

which is the required ans.

Answer 2

Answer:

__________________❤

Factorise ➡️

(a² - 2a)² - 23(a² - 2a) + 120

Let us assume that

$\bold{({a {}^{2} - 2a} {}^{2} ) {}^{2} = x}$

$\bold{x {}^{2} - 23x + 120}$

$\bold{x {}^{2} - 15x - 8x + 120}$

$\bold{(x - 15)(x - 8)}$

$\bold{(a {}^{2} - 2a - 15)(a {}^{2} - 2a - 8)}$

$\bold \red{(a - 5)(a + 3)(a - 4)(a + 2)}$

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