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5x+31=9x^2-108+256
We move all terms to the left:
5x+31-(9x^2-108+256)=0
We get rid of parentheses
-9x^2+5x+108-256+31=0
We add all the numbers together, and all the variables
-9x^2+5x-117=0
a = -9; b = 5; c = -117;
Δ = b2-4ac
Δ = 52-4·(-9)·(-117)
Δ = -4187
Delta is less than zero, so there is no solution for the equation
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