X2-4x=-4

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Solution for X2-4x=-4 equation:



X2-4X=-4
We move all terms to the left:
X2-4X-(-4)=0
We add all the numbers together, and all the variables
X^2-4X+4=0
a = 1; b = -4; c = +4;
Δ = b2-4ac
Δ = -42-4·1·4
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:
$X=\frac{-b}{2a}=\frac{4}{2}=2$

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