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k^2-7=-9
We move all terms to the left:
k^2-7-(-9)=0
We add all the numbers together, and all the variables
k^2+2=0
a = 1; b = 0; c = +2;
Δ = b2-4ac
Δ = 02-4·1·2
Δ = -8
Delta is less than zero, so there is no solution for the equation
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