(a^2/4-b^2/9)*36/3a-2b
(а² - в² ) * 36__ = 9а²- 4в² * 36___ =(3а-2в)*(3а+2в) * 36____
4 9 3a-2b 36 36 36 3a-2b
сократи= 3а+2в
(a^2/4-b^2/9)*36 / 3a-2b =
=(9a^2-4b^2) / 3a-2b=
=(3a-2b) (3a+2b) / 3a-2b =
=3a+2b