16(a + b)2 - 9(a - b)2
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Step-by-step explanation:
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Answer:
7a² + 50ab + 7a²
Step-by-step explanation:
16(a + b)² - 9(a - b)² = 16(a² + 2ab + b²) - 9(a² -2ab + b²)
= 16a² + 32ab + 16b² - 9a² + 18ab - 9b²
= 7a² + 50ab + 7a²
Hope it helps you:)
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