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Steve
Steve asked in Science & MathematicsMathematics · 8 years ago

Solving Polynomial Equations by simplifing and finding the roots!!! 10 points will be given to best answer?

x^3-3x^2+5x-15=0

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

2x^3+15x^2+25x=0

3x^3+13x^2+12x=0

Remember I need the simplified equation and the roots! thx :)

2 Answers

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  • PaulR2
    Lv 7
    8 years ago
    Favorite Answer

    1) ( x - 3 )( x² + 5 )

    The roots are x = 3, x = sqrt 5, and x = -sqrt 5

    2) ( 4x - 3 )( x² + 1 )

    The roots are x = 3/4, x = i, and x = -i

    3) x( 2x + 5 )( x + 5 )

    The roots are x = 0, x = -5, and x = -2.5

    4) x( 3x + 4 )( x + 3 )

    The roots are x = 0, x = -3, and x = -4/3

  • Wedisinghe
    Lv 7
    8 years ago

    X^2(x-3)+5(x-3)=(x-3)(x^2+5)

    x^2(4x-3)+(4x-3)=(4x-3)(x^2+1)

    x(2x+5)(x+5)

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