Question

помогите пжпжпжпж срочнаааааааа даю 50б​

Answer 1

$\displaystyle\bf\\1)\\\\\frac{x^{2} -16x}{(x-7)^{4} }+\frac{2x+49}{(7-x)^{4} } =\frac{x^{2} -16x+2x+49}{(x-7)^{4} } =\\\\\\=\frac{x^{2} -14x+49}{(x-7)^{4} } =\frac{(x-7)^{2} }{(x-7)^{4} } =\frac{1}{(x-7)^{2} } \\\\2)\\\\\frac{y^{2} +y}{(y-6)(y+2)} +\frac{y+36}{(6-y)(2+y)} =\\\\\\=\frac{y^{2} +y}{(y-6)(y+2)} -\frac{y+36}{(y-6)(y+2)} =\\\\\\=\frac{y^{2} +y-y-36}{(y-6)(y+2)} =\frac{y^{2} -36}{(y-6)(y+2)} =\\\\\\=\frac{(y-6)(y+6)}{(y-6)(y+2)} =\frac{y+6}{y+2}$