4k^2-12k=-9

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Solution for 4k^2-12k=-9 equation: 



4k^2-12k=-9

We move all terms to the left:

4k^2-12k-(-9)=0

We add all the numbers together, and all the variables

4k^2-12k+9=0

a = 4; b = -12; c = +9;
Δ = b2-4ac
Δ = -122-4·4·9
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$k=\frac{-b}{2a}=\frac{12}{8}=1+1/2$

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