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-5x^2-20x=300
We move all terms to the left:
-5x^2-20x-(300)=0
a = -5; b = -20; c = -300;
Δ = b2-4ac
Δ = -202-4·(-5)·(-300)
Δ = -5600
Delta is less than zero, so there is no solution for the equation
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