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8x^2+4x=-8
We move all terms to the left:
8x^2+4x-(-8)=0
We add all the numbers together, and all the variables
8x^2+4x+8=0
a = 8; b = 4; c = +8;
Δ = b2-4ac
Δ = 42-4·8·8
Δ = -240
Delta is less than zero, so there is no solution for the equation
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