Y=x2+x-1Yx=3

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Solution for Y=x2+x-1Yx=3 equation: 



=Y2+Y-1Y=3

We move all terms to the left:

-(Y2+Y-1Y)=0

We add all the numbers together, and all the variables

-(+Y^2)=0

We get rid of parentheses

-Y^2=0

We add all the numbers together, and all the variables

-1Y^2=0

a = -1; b = 0; c = 0;
Δ = b2-4ac
Δ = 02-4·(-1)·0
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

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

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