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-8x(2+5x)-2(x+2)=120
We move all terms to the left:
-8x(2+5x)-2(x+2)-(120)=0
We add all the numbers together, and all the variables
-8x(5x+2)-2(x+2)-120=0
We multiply parentheses
-40x^2-16x-2x-4-120=0
We add all the numbers together, and all the variables
-40x^2-18x-124=0
a = -40; b = -18; c = -124;
Δ = b2-4ac
Δ = -182-4·(-40)·(-124)
Δ = -19516
Delta is less than zero, so there is no solution for the equation
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