Solve ? . . .

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1 Answer
Mar 7, 2018

x = -3 and x=18

Explanation:

Given: -8x^2+120x+432 = 0

Divide both sides by -8:

(-8x^2+120x+432)/color(red)(-8) = 0/color(red)(-8)

x^2-15x-54 = 0

Factor:

(x+3)(x-18) = 0

The root are where the factors are equal to 0:

x+3=0 and x-18=0

Solve each factor for x:

x = -3 and x=18