Question

Factorise (a+b)2 -(a-b) 2​

Answer 1

Answer:

${(a + b)}^{2} - {(a - b)}^{2} \\ = (a + b + a - b)(a + b - a + b) \\ = 2a \times 2b \\ = 4ab$

Answer 2

Answer:

$(a+b)^{2}$-$(a-b)^{2}$ =[a+b-(a-b)][a+b+(a-b)].

Step-by-step explanation:

This identity explains that $(a+b)^{2}$-$(a-b)^{2}$ =[a+b-(a-b)][a+b+(a-b)].