a2=-90

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Solution for a2=-90 equation: 



a2=-90

We move all terms to the left:

a2-(-90)=0

We add all the numbers together, and all the variables

a^2+90=0

a = 1; b = 0; c = +90;
Δ = b2-4ac
Δ = 02-4·1·90
Δ = -360
Delta is less than zero, so there is no solution for the equation

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