x2+9=4x

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Solution for x2+9=4x equation: 



x2+9=4x

We move all terms to the left:

x2+9-(4x)=0

We add all the numbers together, and all the variables

x^2-4x+9=0

a = 1; b = -4; c = +9;
Δ = b2-4ac
Δ = -42-4·1·9
Δ = -20
Delta is less than zero, so there is no solution for the equation

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