Question

Сделайте пожалуйста решение!!! Срочно!!! ​

Answer 1

$1)\frac{2d-3}{2d}-\frac{x-2}{x}=\frac{2dx-3x-2dx+4d}{2dx}=\frac{4d-3x}{2dx} \\\\2)\frac{3b+9}{8b}*\frac{12b^{3}}{b+3}=\frac{3(b+3)}{8b}*\frac{12b^{3} }{b+3}=\frac{9b^{2} }{2}=4,5b^{2}\\\\3)\frac{a^{2}-m^{2}}{2a}:(a+m)=\frac{(a+m)(a-m)}{2a}*\frac{1}{a+m}=\frac{a-m}{2a}$

$4)\frac{15x}{5-x}+\frac{6x}{x^{2}-25}*\frac{7x+35}{3}=\frac{15x}{5-x}+\frac{6x*7(x+5)}{(x+5)(x-5)*3}=\frac{15x}{5-x}+\frac{14x}{x-5}=\frac{15x}{5-x}-\frac{14x}{5-x}=\frac{15x-14x}{5-x}=\frac{x}{5-x}$