4x+5x-5=2(x^2-x)
2x^2-11x+5=0
x1=(11+sqrt(121-40))/4=5
x2=(11-sqrt(121-40))/4=1/2
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4x+5x-5=2(x^2-x)
2x^2-11x+5=0
x1=(11+sqrt(121-40))/4=5
x2=(11-sqrt(121-40))/4=1/2