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2x^2+16x=-50
We move all terms to the left:
2x^2+16x-(-50)=0
We add all the numbers together, and all the variables
2x^2+16x+50=0
a = 2; b = 16; c = +50;
Δ = b2-4ac
Δ = 162-4·2·50
Δ = -144
Delta is less than zero, so there is no solution for the equation
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