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Emilee Johnston
Mathematics
10 July, 15:40
Use the quadratic formula to solve 9x^2+12x+4=0
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Leah Montgomery
10 July, 16:02
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Ax²+BC+c=0
x=-b±√b²-4ac/2a
x=-12±√12²-4 (-9x4) / 2 (9)
x=-12±√144+144/18
x=-12±√288/18
x=12±√16
x=-12±4
x=-12-4=-16
x=12+4=8
x=-16; x=8
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