Question

Помогите пожалуйста!!!

Answer 1

Ответ:

(х-9)(х+9)

${(y - 3)}^{2}$

(4х-7)(4х+7)

${(3a + 5b)}^{2}$

Answer 2

${x}^{2} - 81 = (x - 9)(x + 9)$

${y}^{2} - 6y + 9 = (y - 3 {)}^{2}$

${16x}^{2} - 49 = (4x - 7)(4x + 7)$

${9a}^{2} + 60ab + {25b}^{2} = (3a + 5b {)}^{2}$