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2x(x-3)=(1-x)(x+4)
We move all terms to the left:
2x(x-3)-((1-x)(x+4))=0
We add all the numbers together, and all the variables
2x(x-3)-((-1x+1)(x+4))=0
We multiply parentheses
2x^2-6x-((-1x+1)(x+4))=0
We multiply parentheses ..
2x^2-((-1x^2-4x+x+4))-6x=0
We calculate terms in parentheses: -((-1x^2-4x+x+4)), so:We get rid of parentheses
(-1x^2-4x+x+4)
We get rid of parentheses
-1x^2-4x+x+4
We add all the numbers together, and all the variables
-1x^2-3x+4
Back to the equation:
-(-1x^2-3x+4)
2x^2+1x^2+3x-6x-4=0
We add all the numbers together, and all the variables
3x^2-3x-4=0
a = 3; b = -3; c = -4;
Δ = b2-4ac
Δ = -32-4·3·(-4)
Δ = 57
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-\sqrt{57}}{2*3}=\frac{3-\sqrt{57}}{6} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{57}}{2*3}=\frac{3+\sqrt{57}}{6} $
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