# Expand:(i) (8a + 3b)2 (ii) (7x + 2y)2(iii) (5x + 11)2 (iv) (v) (vi) (9x – 10)2(vii) (viii) (ix) (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) By using the formula (a + b)2 = a2 + b2 + 2ab

We get;   (v) By using the formula (a + b)2 = a2 + b2 + 2ab

We get;  (vi) (9x – 10)2

By using the formula (a - b)2 = a2 - 2ab + b2

We get;

(9x – 10)2

= (9x)2 – 2 × (9x) × 10 + (10)2

= 81x2 – 180x + 100

(vii) (x2y – yz2)2

By using the formula (a - b)2 = a2 - 2ab + b2

We get;

= (x2y – yz2)2

= (x2y)2 – 2 × (x2y) × yz2 + (yz2)2

= x4y2 – 2x2y2z2 + y2z4

(viii) By using the formula (a - b)2 = a2 - 2ab + b2

We get; (ix) By using the formula (a - b)2 = a2 - 2ab + b2

We get;

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