( x^2-2x)^2-23( x^2-2x)+120
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please check if it is correct or not
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Step-by-step explanation:
(x^2-2x)^2-23(x^2-2x)+120
let a=x^2-2x
a^2 - 23a +120
a^2-15a-8a+120
a(a-15) - 8(a-15)
(a-15) (a-8)
(x^2-2x-15) (x^2-2x-8)
(x^2+3x-5x-15) (x^2-4x+2x-8)
(x(x+3)-5(x+3)) (x(x-4)+2(x-4))
(x+3) (x-5) (x-4) (x+2)
hope it helps
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