Question

Срочно помогите!!! Дам 5 баллов!!! ​

Answer 1

Ответ:

Пошаговое объяснение:

а) 4/(3xy²) +(5y)/(21x²y)=4/(3xy·y) +(5y)/(3xy·7x)=(28x)/(21x²y²) +(5y²)/(21x²y²)=(28x+5y²)/(21x²y²)

б) (x-3)/(3x+6) -(x-6)/(x+2)=(x-3)/(3(x+2)) -(x-6)/(x+2)=(x-3)/(3(x+2)) -(3(x-6))/(3(x+2))=(x-3-3x+18)/(3(x+2))=(-2x+15)/(3(x+2))=(15-2x)/(3(x+2))