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4x(x-2)=x+2x(x-1)
We move all terms to the left:
4x(x-2)-(x+2x(x-1))=0
We multiply parentheses
4x^2-8x-(x+2x(x-1))=0
We calculate terms in parentheses: -(x+2x(x-1)), so:We get rid of parentheses
x+2x(x-1)
We multiply parentheses
2x^2+x-2x
We add all the numbers together, and all the variables
2x^2-1x
Back to the equation:
-(2x^2-1x)
4x^2-2x^2-8x+1x=0
We add all the numbers together, and all the variables
2x^2-7x=0
a = 2; b = -7; c = 0;
Δ = b2-4ac
Δ = -72-4·2·0
Δ = 49
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{49}=7$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-7)-7}{2*2}=\frac{0}{4} =0 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-7)+7}{2*2}=\frac{14}{4} =3+1/2 $
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