30x+9x^2=-25

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Solution for 30x+9x^2=-25 equation: 



30x+9x^2=-25

We move all terms to the left:

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

We add all the numbers together, and all the variables

9x^2+30x+25=0

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

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-30}{18}=-1+2/3$

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