Question

2с(с-в)-(с-3)(с+3) выполните дейсивия​

Answer 1

$2c(c - b) - (c - 3)( c + 3) =$

$= 2 {c}^{2} - 2cb - ( {c}^{2} - {3}^{2} ) =$

$= 2 {c}^{2} - 2cb - {c}^{2} + 9 =$

$= {c}^{2} - 2cb + 9 = {(c - 3)}^{2}$

Answer 2

___________________

Готово!!Удачи:))))

____________________