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Joey
Joey asked in Science & MathematicsAstronomy & Space · 7 years ago

How do I enter this into Wolfram Alpha?

Solve the equation x^3-5x^2+2x+8=0 given that -1 is a zero of f(x)=x^3-5x^2+2x+8.

Looking for a solution set.

2 Answers

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  • ?
    Lv 7
    7 years ago
    Favorite Answer

    Just paste that equation in.

    x^3-5x^2+2x+8=0

    It will give you the three zeros (one of which is -1)

  • chanljkk
    Lv 7
    7 years ago

    2x4=8, -1x(-8)=8,

    substitute into equation for

    x= -1, -1-5-2+8=0;

    x=2, 8-20+4+8=0;

    x=4, 4(16-20+2)+8=0

    so it has three roots: -1, 2 and 4.

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