Question

(а-3)²+(2а+3)²= ответ

Answer 1

5a^2+6a+18 получится вот это 

Answer 2

To find the answer, we need to expand and simplify the expression:

(а-3)² + (2а+3)²

= (а-3)(а-3) + (2а+3)(2а+3)

= а² - 6а + 9 + 4а² + 12а + 9

= 5а² + 6а + 18

Therefore, the answer is 5а² + 6а + 18.