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x(5-2x)=11
We move all terms to the left:
x(5-2x)-(11)=0
We add all the numbers together, and all the variables
x(-2x+5)-11=0
We multiply parentheses
-2x^2+5x-11=0
a = -2; b = 5; c = -11;
Δ = b2-4ac
Δ = 52-4·(-2)·(-11)
Δ = -63
Delta is less than zero, so there is no solution for the equation
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