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7b-b^2-60=0
We add all the numbers together, and all the variables
-1b^2+7b-60=0
a = -1; b = 7; c = -60;
Δ = b2-4ac
Δ = 72-4·(-1)·(-60)
Δ = -191
Delta is less than zero, so there is no solution for the equation
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