Question

(a + b)2 - (a - b)2 factorise
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Answer 1

Answer:

4ab

Step-by-step explanation:

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Answer 2

Answer:We know the identity a  

2  −b  2 =(a+b)(a−b)  

Using the above identity, the  given expressiona  

2  −b  2  −a+b can be factorised as follows: a  2  −b  2  −a+b=[(a+b)(a−b)]−1(a−b)(a−b(a+b−1)  

Hence, a 2  −b  2  −a+b=(a−b)(a+b−1)