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7b^2=-168
We move all terms to the left:
7b^2-(-168)=0
We add all the numbers together, and all the variables
7b^2+168=0
a = 7; b = 0; c = +168;
Δ = b2-4ac
Δ = 02-4·7·168
Δ = -4704
Delta is less than zero, so there is no solution for the equation
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