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2x-(x*x)=12
We move all terms to the left:
2x-(x*x)-(12)=0
We add all the numbers together, and all the variables
2x-(+x*x)-12=0
We get rid of parentheses
2x-x*x-12=0
Wy multiply elements
-1x^2+2x-12=0
a = -1; b = 2; c = -12;
Δ = b2-4ac
Δ = 22-4·(-1)·(-12)
Δ = -44
Delta is less than zero, so there is no solution for the equation
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