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(2x*2x)+20x+25=0
We add all the numbers together, and all the variables
(+2x*2x)+20x+25=0
We add all the numbers together, and all the variables
20x+(+2x*2x)+25=0
We get rid of parentheses
20x+2x*2x+25=0
Wy multiply elements
4x^2+20x+25=0
a = 4; b = 20; c = +25;
Δ = b2-4ac
Δ = 202-4·4·25
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{-20}{8}=-2+1/2$
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