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(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{2x²+3x+1}): \frac{3x-6}{2x²-x-1}

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Răspuns :

[tex](\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{2x^{2}+3x+1}): \frac{3x-6}{2x^{2}-x-1}=[/tex]

[tex]=(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{x^{2}+x^{2}+2x+x+1}): \frac{3x-6}{x^{2}+x^{2}-x-1}=[/tex]

[tex]=(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{x^{2}+2x+1+x^{2}+x}): \frac{3x-6}{x^{2}-1+x^{2}-x}=[/tex]

[tex]=(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{(x+1)^{2}+x(x+1)}): \frac{3x-6}{(x-1)(x+1)+x(x-1)}=[/tex]

[tex]=(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{(x+1)(x+1+x)}): \frac{3x-6}{(x-1)(x+1+x)}=[/tex]

[tex]=(\frac{5}{2x+1}-\frac{1}{x+1}-\frac{1}{(x+1)(2x+1)}): \frac{3x-6}{(x-1)(2x+1)}=[/tex]

[tex]=(\frac{5(x+1)}{(x+1)(2x+1)}-\frac{2x+1}{(x+1)(2x+1)}-\frac{1}{(x+1)(2x+1)})* \frac{(x-1)(2x+1)}{3(x-2)}=[/tex]

[tex]=\frac{5x+5-2x-1-1}{(x+1)(2x+1)}* \frac{(x-1)(2x+1)}{3(x-2)}=[/tex]

[tex]=\frac{3x+3}{1}*\frac{1}{3(x-2)}=[/tex]

[tex]=\frac{3(x+1)}{3(x-2)}=[/tex]

[tex]=\frac{x+1}{x-2}[/tex]
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