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-5x(x-1)=2x+15
We move all terms to the left:
-5x(x-1)-(2x+15)=0
We multiply parentheses
-5x^2+5x-(2x+15)=0
We get rid of parentheses
-5x^2+5x-2x-15=0
We add all the numbers together, and all the variables
-5x^2+3x-15=0
a = -5; b = 3; c = -15;
Δ = b2-4ac
Δ = 32-4·(-5)·(-15)
Δ = -291
Delta is less than zero, so there is no solution for the equation
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