Factorisation of p⁴ - 81 is

1. (p² - 9)(p² + 9)

2. (p - 3)(p + 3)(p² + 9)

3. (p - 3)²(p + 3)²

4. none of these

One of the factors of (25x² - 1) + (1 + 5x)² is

1. 5 + x

2. 5 - x

3. 5x - 1

4. 10x

Factorisation of 3x² + 7x - 6

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

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

3. (3x - 2)(x - 3)

4. (3x + 2)(x + 3)

Factorisation of 4x² + 8x + 3 is

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

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

3. (2x + 2)(2x + 5)

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