25x2+9=30x

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Solution for 25x2+9=30x equation: 



25x^2+9=30x

We move all terms to the left:

25x^2+9-(30x)=0

a = 25; b = -30; c = +9;
Δ = b2-4ac
Δ = -302-4·25·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{30}{50}=3/5$

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