(i) Given,
(8a + 3b)2
By using the formula (a + b)2 = a2 + b2 + 2ab
We get;
= (8a)2 + (3b)2 + 2 × 8a × 3b
= 64a2 + 9b2 + 48ab
(ii) (7x + 2y)2
By using the formula (a + b)2 = a2 + b2 + 2ab
We get;
= (7x)2 + (2y)2 + 2 × (7x) × (2y)
= 49x2 + 4y2 + 28xy
(iii) (5x + 11)2
By using the formula (a + b)2 = a2 + b2 + 2ab
We get;
= (5x)2 + (11)2 + 2×(5x) × 11
= 25x2 + 121 + 110x
(iv) \((\frac{a}{2}+\frac{2}{a})^2\)
By using the formula (a + b)2 = a2 + b2 + 2ab
We get;
\((\frac{a}{2}+\frac{2}{a})^2\)