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X+3-5X+7+4X^2=0
We add all the numbers together, and all the variables
4X^2-4X+10=0
a = 4; b = -4; c = +10;
Δ = b2-4ac
Δ = -42-4·4·10
Δ = -144
Delta is less than zero, so there is no solution for the equation
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