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6y-2y(y+3)=26
We move all terms to the left:
6y-2y(y+3)-(26)=0
We multiply parentheses
-2y^2+6y-6y-26=0
We add all the numbers together, and all the variables
-2y^2-26=0
a = -2; b = 0; c = -26;
Δ = b2-4ac
Δ = 02-4·(-2)·(-26)
Δ = -208
Delta is less than zero, so there is no solution for the equation
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