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r^2+3=-10
We move all terms to the left:
r^2+3-(-10)=0
We add all the numbers together, and all the variables
r^2+13=0
a = 1; b = 0; c = +13;
Δ = b2-4ac
Δ = 02-4·1·13
Δ = -52
Delta is less than zero, so there is no solution for the equation
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