9x^2=-720

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Solution for 9x^2=-720 equation: 



9x^2=-720

We move all terms to the left:

9x^2-(-720)=0

We add all the numbers together, and all the variables

9x^2+720=0

a = 9; b = 0; c = +720;
Δ = b2-4ac
Δ = 02-4·9·720
Δ = -25920
Delta is less than zero, so there is no solution for the equation

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