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4x^2-11x+30=16
We move all terms to the left:
4x^2-11x+30-(16)=0
We add all the numbers together, and all the variables
4x^2-11x+14=0
a = 4; b = -11; c = +14;
Δ = b2-4ac
Δ = -112-4·4·14
Δ = -103
Delta is less than zero, so there is no solution for the equation
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