12x^2+8=-9x

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Solution for 12x^2+8=-9x equation: 



12x^2+8=-9x

We move all terms to the left:

12x^2+8-(-9x)=0

We get rid of parentheses

12x^2+9x+8=0

a = 12; b = 9; c = +8;
Δ = b2-4ac
Δ = 92-4·12·8
Δ = -303
Delta is less than zero, so there is no solution for the equation

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