Solve the quadratic equation 9x2 + 6x = 4 by using quadratic formula.
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answer for this question is -1/3
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x= -b±√b²-4ac
2a
x= -6±√6²-4×9×-4
2×9
x=-6±√36+144
18
x= -6±√180
18
x= -6±√2×2×3×3×5
18
x= -6±6√5
18
x= 6(-1±√5)
18
x= -1±√5
3
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