solve -16x^2+80x+576

solve for x , there should be two answers
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1 Answer

solve -16x^2+80x+576

let f(x) = -16x^2+80x+576 = 0, then

16x^2-80x-576 = 0  divide through by 16

x^2 - 5x - 36 = 0    now factorise

(x + 4)(x - 9) = 0

x = -4, x = 9

by Level 11 User (81.5k points)

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