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21x(2-x)+12x=44
We move all terms to the left:
21x(2-x)+12x-(44)=0
We add all the numbers together, and all the variables
21x(-1x+2)+12x-44=0
We add all the numbers together, and all the variables
12x+21x(-1x+2)-44=0
We multiply parentheses
-21x^2+12x+42x-44=0
We add all the numbers together, and all the variables
-21x^2+54x-44=0
a = -21; b = 54; c = -44;
Δ = b2-4ac
Δ = 542-4·(-21)·(-44)
Δ = -780
Delta is less than zero, so there is no solution for the equation
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