18=-2x^2

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Solution for 18=-2x^2 equation: 



18=-2x^2

We move all terms to the left:

18-(-2x^2)=0

We get rid of parentheses

2x^2+18=0

a = 2; b = 0; c = +18;
Δ = b2-4ac
Δ = 02-4·2·18
Δ = -144
Delta is less than zero, so there is no solution for the equation

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