8x+x^2=-4.5^2

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Solution for 8x+x^2=-4.5^2 equation: 



8x+x^2=-4.5^2

We move all terms to the left:

8x+x^2-(-4.5^2)=0

We add all the numbers together, and all the variables

x^2+8x+20.25=0

a = 1; b = 8; c = +20.25;
Δ = b2-4ac
Δ = 82-4·1·20.25
Δ = -17
Delta is less than zero, so there is no solution for the equation

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