Question

11. Find :
(i) (a + b) (a + b)
(ii) (a + b) (a + b) (a + b)
(iii) (a - b) (a - b) (a - b) by using the result
of part (ii)​

Answer 1

1.

$(a + b) ^{2} = {a}^{2} + {b}^{2} + 2ab$

2.

$(a + b) ^{3} = {a}^{3} + {b}^{3} + 3ab(a + b)$

3.

$(a - b) ^{3} = {a}^{3} - {b}^{3} - 3ab(a - b)$

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