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6 September, 14:42

Simplify (x - 3) (x2 + 7x - 8).

a x3 - 11x2 - 8x + 24

b x3 + 7x2 - 11x + 24

cx3 + 4x2 - 29x + 24

d x3 + 10x2 + 13x + 24

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Answers (1)
  1. 6 September, 16:38
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    (x - 3) (x^2 + 7x - 8) =

    x (x^2 + 7x - 8) - 3 (x^2 + 7x - 8) =

    x^3 + 7x^2 - 8x - 3x^2 - 21x + 24 =

    x^2 + 4x^2 - 29x + 24 <==
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