jking257
jking257
16-01-2019
Mathematics
contestada
use the quadratic formula to solve 9x^2+12x+4=0
Respuesta :
oghenekevwe
oghenekevwe
18-01-2019
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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