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X2=2X-168
We move all terms to the left:
X2-(2X-168)=0
We add all the numbers together, and all the variables
X^2-(2X-168)=0
We get rid of parentheses
X^2-2X+168=0
a = 1; b = -2; c = +168;
Δ = b2-4ac
Δ = -22-4·1·168
Δ = -668
Delta is less than zero, so there is no solution for the equation
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