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2u^2+7u-14u+49=0
We add all the numbers together, and all the variables
2u^2-7u+49=0
a = 2; b = -7; c = +49;
Δ = b2-4ac
Δ = -72-4·2·49
Δ = -343
Delta is less than zero, so there is no solution for the equation
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