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X^2+6X+15=2
We move all terms to the left:
X^2+6X+15-(2)=0
We add all the numbers together, and all the variables
X^2+6X+13=0
a = 1; b = 6; c = +13;
Δ = b2-4ac
Δ = 62-4·1·13
Δ = -16
Delta is less than zero, so there is no solution for the equation
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