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Solve the equation x^3+2x^2-5x-6=0 given that 2 is a zero of f(x)=x^3+2x^2-5x-6?

The solution set is?

1 Answer

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  • 7 years ago

    x³ + 2x² - 5x - 6 = 0

    (x + 1)(x - 2)(x + 3) = 0

    If the product of three factors is zero,

    then any or all factors equal zero.

    If x + 1 = 0,

    x = - 1

    If x - 2 = 0,

    x = 2

    If x + 3 = 0,

    x = - 3

    x { - 3, - 1, 2 }

    ¯¯¯¯¯¯¯¯¯¯¯

     

    Source(s): 4/25/14
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