Math 8 · Unit 2: Expressions, formulae and equations · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. Expand 3(x + 4).

   • 3x + 7
   • x + 12
   • 3x + 4
   • 3x + 12
   Check

2. 2. Expand −2(x − 5).

   • 2x + 10
   • −2x + 10
   • −2x − 10
   • −2x − 5
   Check

3. 3. Expand x(x + 3).

   • x² + 3x
   • 2x + 3
   • x² + 3
   • x + 3x
   Check

4. 4. Expand and simplify 2(x + 3) + 4(x − 1).

   • 6x + 10
   • 6x + 2
   • 6x − 2
   • 6x + 5
   Check

5. 5. Expand 5(2a − 3).

   • 7a − 15
   • 10a − 3
   • 10a − 15
   • 10a + 15
   Check

6. 6. Expand 4(3 − y).

   • 12 + 4y
   • 7 − 4y
   • 12 − y
   • 12 − 4y
   Check

7. 7. Expand and simplify 3(x + 2) − 2(x + 1).

   • x + 8
   • x + 4
   • 5x + 4
   • x + 2
   Check

8. 8. Expand 2y(y − 4).

   • 2y² − 4
   • 2y² − 8y
   • 2y − 8y
   • 2y² − 8
   Check

9. 9. Which is equal to 6x + 18?

   • 6(x + 3)
   • 6(x + 18)
   • 3(x + 6)
   • 6x(3)
   Check

10. 10. Expand −(x + 7).

    • x − 7
    • −x − 7
    • −7x
    • −x + 7
    Check

11. 11. Expand and simplify 5(a + b) − 3a.

    • 8a + 5b
    • 2a + b
    • 5b − 2a
    • 2a + 5b
    Check

12. 12. Expand 0.5(4x + 8).

    • 4.5x + 8.5
    • 4x + 4
    • 2x + 4
    • 2x + 8
    Check

13. 13. A rectangle is 3 by (x + 5). What is its area?

    • x + 15
    • 3x + 8
    • 3x + 5
    • 3x + 15
    Check

14. 14. Expand −3(2 − m).

    • −6 + 3m
    • −6 − m
    • −6 − 3m
    • 6 + 3m
    Check

15. 15. Expand and simplify x(x + 2) + 3x.

    • x² + 6x
    • x² + 2x + 3
    • 5x²
    • x² + 5x
    Check