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16 July, 20:38

Solve quadratic equations by factoring

x cubed + 3x squared - 4x = 0

+1
Answers (2)
  1. 16 July, 20:51
    0
    x (x^2-3x-4) = 0

    factor

    x (x-4) (x+1) = 0

    x=0

    x=4

    x=-1
  2. 17 July, 00:11
    0
    x cubed + 3x squared - 4x = 0

    = x^3 + 3x^2 - 4x = 0

    =x (x^2 + 3x - 4) = 0

    = x (x+4) (x-1) = 0

    x = 0

    x + 4 = 0 then x = - 4

    x - 1 = 0 then x = 1

    answer: x = 0, x = - 4 and x = 1
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