-5x^2+6x+4=-7x^2-2x-4

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Solution for -5x^2+6x+4=-7x^2-2x-4 equation: 



-5x^2+6x+4=-7x^2-2x-4

We move all terms to the left:

-5x^2+6x+4-(-7x^2-2x-4)=0

We get rid of parentheses

-5x^2+7x^2+2x+6x+4+4=0

We add all the numbers together, and all the variables

2x^2+8x+8=0

a = 2; b = 8; c = +8;
Δ = b2-4ac
Δ = 82-4·2·8
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-8}{4}=-2$

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