-9=7x^2-

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Solution for -9=7x^2- equation: 



-9=7x^2-

We move all terms to the left:

-9-(7x^2-)=0

We get rid of parentheses

-7x^2-9+=0

We add all the numbers together, and all the variables

-7x^2=0

a = -7; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-7)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{0}{-14}=0$

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