Question

a²-4ab-77b² factorise by splitting the middle term.​

Answer 1

Answer:

(a-11b) (a+7b)

Step-by-step explanation:

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Answer 2

Answer:

(a - 11b) (a + 7b)

Step-by-step explanation:

a² - 4ab - 77b²

= a² + 7ab - 11ab - 77b²

= a (a + 7b) - 11b (a + 7b)

= (a - 11b) (a + 7b)

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