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nevsk [136]
3 years ago
5

Factorise the polynomial x^3 - 5x^2 +2x +8, (x-4) is a factor. Pllsss i need help ASAP! T^T

Mathematics
1 answer:
vfiekz [6]3 years ago
4 0

Answer:

  x^3 - 5x^2 + 2x + 8

= (x^3 - 4x^2) - (x^2 - 4x) - (2x - 8)

= x^2(x - 4) - x(x - 4) - 2(x - 4)

= (x^2 - x - 2)(x - 4)

= [x(x - 2) + (x - 2)](x - 4)

= (x - 2)(x + 1)(x - 4)

Hope this helps!

:)

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