100x2-40x=-4.

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Solution for 100x2-40x=-4. equation:



100x^2-40x=-4.
We move all terms to the left:
100x^2-40x-(-4.)=0
We add all the numbers together, and all the variables
100x^2-40x-(-4)=0
We add all the numbers together, and all the variables
100x^2-40x+4=0
a = 100; b = -40; c = +4;
Δ = b2-4ac
Δ = -402-4·100·4
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{40}{200}=1/5$

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