Question

(ii) 3 (a - 2b)2 - 4(a - 2b)​

Answer 1

Answer:

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Answer 2

Answer:

3a² - 4a + 8b - 11ab + 12b²

Step-by-step explanation:

3(a-2b)² - 4(a-2b)

= 3(a²-4ab+4b²) - 4a + 8b -((a-b)² = a²-2ab+b²)

= 3a² - 11ab + 12b² - 4a + 8b

= 3a² - 4a + 8b - 11ab + 12b²