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10x-x^2-43=0
We add all the numbers together, and all the variables
-1x^2+10x-43=0
a = -1; b = 10; c = -43;
Δ = b2-4ac
Δ = 102-4·(-1)·(-43)
Δ = -72
Delta is less than zero, so there is no solution for the equation
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