Factorise by grouping method :

(ax + by)² + (bx - ay)²

Factorise by grouping method :

a²x² + (ax² + 1)x + a

x² + 2(5x + 12) in the form of factors is :

1. (x - 6)(x + 4)

2. (x - 6)(x - 4)

3. (x + 6)(x + 4)

4. (x + 6)(x - 4)

x(2x - 5) + 3 in the form of factors is :

1. (x + 1)(2x - 3)

2. (x + 1)(2x + 3)

3. (x - 1)(2x + 3)

4. (x - 1)(2x - 3)