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10k^2-8k=-8
We move all terms to the left:
10k^2-8k-(-8)=0
We add all the numbers together, and all the variables
10k^2-8k+8=0
a = 10; b = -8; c = +8;
Δ = b2-4ac
Δ = -82-4·10·8
Δ = -256
Delta is less than zero, so there is no solution for the equation
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