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5x^2-12x=-9
We move all terms to the left:
5x^2-12x-(-9)=0
We add all the numbers together, and all the variables
5x^2-12x+9=0
a = 5; b = -12; c = +9;
Δ = b2-4ac
Δ = -122-4·5·9
Δ = -36
Delta is less than zero, so there is no solution for the equation
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