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-2a(a+2a-3)=36
We move all terms to the left:
-2a(a+2a-3)-(36)=0
We add all the numbers together, and all the variables
-2a(3a-3)-36=0
We multiply parentheses
-6a^2+6a-36=0
a = -6; b = 6; c = -36;
Δ = b2-4ac
Δ = 62-4·(-6)·(-36)
Δ = -828
Delta is less than zero, so there is no solution for the equation
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