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8m^2+20m=-70
We move all terms to the left:
8m^2+20m-(-70)=0
We add all the numbers together, and all the variables
8m^2+20m+70=0
a = 8; b = 20; c = +70;
Δ = b2-4ac
Δ = 202-4·8·70
Δ = -1840
Delta is less than zero, so there is no solution for the equation
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