Verified answer

Ответ:

1) (y-x) × (y+x)

2) 9 - 9m²

3) (2-p)-(2-p)-(4-p²)

4) (5-a³)× (5+ a³)

5) (m²-n) ×(m²+n)

6) (1-x) × (1+x) × (1 +x²)

7) (p⁴ -7) × (p⁴+7)