Question

Сократите дробь:a^2-9b^2/3a-9b 

Answer 1

a^2-9b^2/3a-9b = (a-3b)*(a+3b) / (3*(a - 3b) = (a+3b)/3

Answer 2

готово

Answer 3

(a-3b)(a+3b)/3(a-3b)= (a+3b)/3