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135+x(x-3)/2=2x
We move all terms to the left:
135+x(x-3)/2-(2x)=0
We add all the numbers together, and all the variables
-2x+x(x-3)/2+135=0
We multiply all the terms by the denominator
-2x*2+x(x-3)+135*2=0
We add all the numbers together, and all the variables
-2x*2+x(x-3)+270=0
We multiply parentheses
x^2-2x*2-3x+270=0
Wy multiply elements
x^2-4x-3x+270=0
We add all the numbers together, and all the variables
x^2-7x+270=0
a = 1; b = -7; c = +270;
Δ = b2-4ac
Δ = -72-4·1·270
Δ = -1031
Delta is less than zero, so there is no solution for the equation
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