Factorise the following:
3x + 18
2x - 14
6x + 4
9x - 15
5x + 40
7x - 49
18x + 9
15x - 10
6m + 18
x^2 + 2x
2x^2 - 6x
15x - 10x^3
9x^2 + 3x^2
x^2 - 2x
6x^2 + 12x
3x^3 - 9x
4x^2 + 28x^3
x^2 + 3x
2x^2 - 8x
6x + 9x^3
12x^3 - 4x^2

1. 3 (×+6)

2. 2 (×-7)

3. 2 (3×+2)

4. 3 (3×-5)

5. 5 (×+8)

6. 7 (×-7)

7. 9 (2×+1)

8. 5 (3×-2)

9. 6 (m+3)

10. ×(×+2)

11. 2×(×-3)

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb