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8+7x^2+5x+6=2
We move all terms to the left:
8+7x^2+5x+6-(2)=0
We add all the numbers together, and all the variables
7x^2+5x+12=0
a = 7; b = 5; c = +12;
Δ = b2-4ac
Δ = 52-4·7·12
Δ = -311
Delta is less than zero, so there is no solution for the equation
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