Aiuto

[indio57]

x^2+(x-1)(x+2)=2(x-1)(x+1)
2(2x-1)(x+2)-(2x-1)^2 =x+2
x(x-2)(x+2)-2x(x-1)^2=x^2(4-x)+6

[Max 2433/BO]

[math] x^2+(x-1)(x+2)=2(x-1)(x+1) [/math]

[math] x^2+x^2+2x-x-2=2(x^2-1) [/math]

[math] 2x^2+x-2=2x^2-2 [/math]

[math] x=0 [/math]

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[math] 2(2x-1)(x+2)-(2x-1)^2 = x+2 [/math]

[math] 2(2x^2+4x-x-2)-(4x^2-4x+1)=x+2 [/math]

[math] 4x^2+6x-4-4x^2+4x-1 = x+2 [/math]

[math] 9x = 7 [/math]

[math] x = \frac {7}{9} [/math]

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[math] x(x-2)(x+2)-2x(x-1)^2=x^2(4-x)+6 [/math]

[math] x(x^2-4)-2x(x^2-2x+1)=4x^2-x^3+6 [/math]

[math] x^3-4x-2x^3+4x^2-2x=4x^2-x^3+6 [/math]

[math] -6x= 6 [/math]

[math] x = -1 [/math]

:hi

Massimiliano