72=-9x2

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Solution for 72=-9x2 equation: 



72=-9x^2

We move all terms to the left:

72-(-9x^2)=0

We get rid of parentheses

9x^2+72=0

a = 9; b = 0; c = +72;
Δ = b2-4ac
Δ = 02-4·9·72
Δ = -2592
Delta is less than zero, so there is no solution for the equation

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