Ответ:
[tex]\frac{4}{y-4}[/tex]
Объяснение:
[tex]\frac{2y}{y-4}-\frac{4}{y+4}+\frac{2y^2}{16-y^2}=\frac{2y}{y-4}-\frac{4}{y+4}-\frac{2y^2}{y^2-16}=\\\\\frac{2y}{y-4}-\frac{4}{y+4}-\frac{2y^2}{(y-4)(y+4)}=\frac{2y(y+4)}{(y-4)(y+4)}-\frac{4(y-4)}{(y-4)(y+4)}-\frac{2y^2}{(y-4)(y+4)}=\\\\\frac{2y(y+4)-4(y-4)-2y^2}{(y-4)(y+4)}=\frac{2y^2+8y-4y+16-2y^2}{(y-4)(y+4)}=\\\\\frac{4y+16}{(y-4)(y+4)}=\frac{4(y+4)}{(y-4)(y+4)}=\frac{4}{y-4}[/tex]
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Answers & Comments
Ответ:
[tex]\frac{4}{y-4}[/tex]
Объяснение:
[tex]\frac{2y}{y-4}-\frac{4}{y+4}+\frac{2y^2}{16-y^2}=\frac{2y}{y-4}-\frac{4}{y+4}-\frac{2y^2}{y^2-16}=\\\\\frac{2y}{y-4}-\frac{4}{y+4}-\frac{2y^2}{(y-4)(y+4)}=\frac{2y(y+4)}{(y-4)(y+4)}-\frac{4(y-4)}{(y-4)(y+4)}-\frac{2y^2}{(y-4)(y+4)}=\\\\\frac{2y(y+4)-4(y-4)-2y^2}{(y-4)(y+4)}=\frac{2y^2+8y-4y+16-2y^2}{(y-4)(y+4)}=\\\\\frac{4y+16}{(y-4)(y+4)}=\frac{4(y+4)}{(y-4)(y+4)}=\frac{4}{y-4}[/tex]