Verified answer

Покрокове пояснення:

1)=р^2+16р+64

2)=100х^2-60ху+9у^2

3)=х^2-81

4)=49n^2-16m^2

Verified answer

1) (P + 8)² = P² + 16P + 64;

2) (10x - 3y)² = 100x² - 60xy + 9y²;

3) (x - 9)(x + 9) = x² - 81;

4) (4m + 7n) (7n - 4m) = 49n² - 16m²