a(x - y) - b(x - y)² is equal to:

1. (x - y)² (a - b)

2. (x + y) (x - y) (a - b)

3. (x - y) (a - bx + by)

4. (x - y) (a - bx - by)

a² + bc + ab + ac is equal to:

1. (a + b)(a + c)

2. (a + b)(b + c)

3. (a + c) (a - b)

4. (a - b) (b + c)

1 - 2x - 2x² + 4x³ is equal to:

1. (1 + 2x) (1 - 2x²)

2. (1 + 2x) (1 + 2x²)

3. (1 - 2x) (1 - 2x²)

4. (1 - 2x) (1 + 2x²)

a(x - y) - b(y - x)² is equal to:

1. (x - y)(a - by + bx)

2. (y - x)(a - bx + by)

3. (x - y) (a - bx - by)

4. (x - y) (a - bx + by)