Simplify: (a+3)²-3(2a+3)
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Answer:
The answer is a²
Step-by-step explanation:
Identity (a+b)² = a² + b² + 2ab
( a + 3 )² - 3 (2a + 3)
= (a)² + (3)² + 2×a×3 - 6a - 9
= a² + 9 + 6a - 6a - 9
= a²
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