Question

factorise a²-b²=(a+b) (a-b)​

Answer 1

Answer. a2 - b2 - a - b = [(a - b)(a + b)] - (a + b) = (a + b)(a - b - 1). Therefore, factors of a2 - b2 - a - b are (a + b)(a - b - 1)

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Answer 2

Answer:

a square - b square

= (a + b)(a - b)