algebra

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what is the solution set of -4x2=5x+9?
p.s. its suppose to be -4xsquared=5x+9

  • algebra -

    -4x^2 = 5x + 9
    4x^2 + 5x + 9 = 0
    Use Quadratic Formula:
    X = -5 +- (sqrt(5^2-4*4*9))/2*4
    X = (-5 +- sqrt(-119))/8
    X = (-5 +- 10.91i)/8

    X = -0.625+1.36i, and -0.625-1.36i.

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