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2(x^2+4)=-20
We move all terms to the left:
2(x^2+4)-(-20)=0
We add all the numbers together, and all the variables
2(x^2+4)+20=0
We multiply parentheses
2x^2+8+20=0
We add all the numbers together, and all the variables
2x^2+28=0
a = 2; b = 0; c = +28;
Δ = b2-4ac
Δ = 02-4·2·28
Δ = -224
Delta is less than zero, so there is no solution for the equation
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