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2) (12 xy)² = 12² x² y²
3) (2x - 3)² = (2x)² + 2(2x)(-3) + (-3)² = 4x² -12x + 9
2.(12×y)²= 12x² y²
3.(2×-3)²= (2×-3)(2×-3)
=4x²- 6x-6x +9
= 4x²- 12x + 9