Question

7.20 упростите пж пж пж пж пж

Answer 1

Ответ:

Объяснение:

1) (m/(m+1) +1)÷(1 -(3m²)/(1-m²))=(m+m+1)/(m+1) ÷(1-m²-3m²)/(1-m²)=(2m+1)/(m+1) ·((1+m)(1-m))/(1-4m²)=((2m+1)(1-m))/((1-2m)(1+2m))=(1-m)/(1-2m)=(m-1)/(2m-1)

2) ((2x+1)/(2x-1) -(2x-1)/(2x+1))·(10x-5)/(4x)=((2x+1)²-(2x-1)²)/((2x-1)(2x+1)) ·(5(2x-1))/(4x)=((2x+1-2x+1)(2x+1+2x-1))/(2x+1) ·5/(4x)=(2·4x)/(2x+1) ·5/(4x)=10/(2x+1)