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(4-x)(1/2x-4)=0
Domain of the equation: 2x-4)!=0We add all the numbers together, and all the variables
x∈R
(-1x+4)(1/2x-4)=0
We multiply parentheses ..
(-1x^2+4x+4x-16)=0
We get rid of parentheses
-1x^2+4x+4x-16=0
We add all the numbers together, and all the variables
-1x^2+8x-16=0
a = -1; b = 8; c = -16;
Δ = b2-4ac
Δ = 82-4·(-1)·(-16)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$x=\frac{-b}{2a}=\frac{-8}{-2}=+4$
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