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
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