Question

Помогите пожалуйста очень прошу

Answer 1

$( frac{2m + 1}{2m - 1} - frac{2m - 1}{2m + 1} ) div frac{4m}{10m - 5} = frac{ {(2m + 1)}^{2} - {(2m - 1)}^{2} }{(2m - 1)(2m + 1)} div frac{4}{5(2m - 1)} = frac{(2m + 1 + 2m - 1)(2m + 1 - 2m + 1)}{(2m - 1)(2m + 1)} times frac{5(2m - 1)}{4} = frac{4m times 2}{2m + 1} times frac{5}{4} = frac{10m}{2m + 1}$

Answer 2

(2m+1)²-(2m-1)²/(2m-1)*(2m+1)*10m-5/4m=2*4m/(2m-1)*(2m+1)*(5(2m-1)/4m=8m/2m+1*5/4m=2/2m+1*5=10/2m+1