factorize x(x-2)*(x-4) +4x -8
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= x(x-2)*(x-4) + 4x - 8
= x(x-2)*(x-4) + 4(x-2)
= (x-2)[x(x-4) + 4]
= (x-2)[x^2-4x + 4]
= (x-2)(x-2)^2
= (x-2)^3
hope it helped you
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