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10x-3(8-5x)x=-74
We move all terms to the left:
10x-3(8-5x)x-(-74)=0
We add all the numbers together, and all the variables
10x-3(-5x+8)x-(-74)=0
We add all the numbers together, and all the variables
10x-3(-5x+8)x+74=0
We multiply parentheses
15x^2+10x-24x+74=0
We add all the numbers together, and all the variables
15x^2-14x+74=0
a = 15; b = -14; c = +74;
Δ = b2-4ac
Δ = -142-4·15·74
Δ = -4244
Delta is less than zero, so there is no solution for the equation
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