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6x(5x-3)=-138
We move all terms to the left:
6x(5x-3)-(-138)=0
We add all the numbers together, and all the variables
6x(5x-3)+138=0
We multiply parentheses
30x^2-18x+138=0
a = 30; b = -18; c = +138;
Δ = b2-4ac
Δ = -182-4·30·138
Δ = -16236
Delta is less than zero, so there is no solution for the equation
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