Question

срочно ❗❗❗❗❗❗ помогите ​

Answer 1

Ответ:

1)

$x - 3y + {x}^{2} - 9 {y}^{2} =(x - 3y) + (x - 3y)(x + 3y) = (x - 3y)(1 + x - 3y)$

2)

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