1. The factorisation of a³ + a²b + ab² is

2. The factorisation of x²yz + xy²z + xyz² is

3. The factorisation of ax²y + bxy² + cxyz is

4. The factorisation of
a (x + y + z) + b(x + y + z) + c(x + y + z) is

5. The factorisation of 6xy - 4y + 6 - 9x is

6. The factorisation of x² + xy + 2x + 2y is

7. The factorisation of ax + bx - ay - by is

8. The factorisation of ab - a - b + 1 is

9. The factorisation of
x² + x + xy + y + zx + z is

10. The factorisation of x²y² + xy + xy²z + yz + x²yz + xz is