Solutions

Problem Set 2

Algebra

1. Using this, please expand (x + 4)*(x+10) with the result of x² + 14x + 40

2. Please expand (x – 7)*(x – 1) and show the result is x² – 8x + 7

3. Please expand (x – 9)*(x + 9) and show the result is x² -81

4. What is the expansion of (x – 8)*(x+12) ? x² + 4x -96

5. What is the expansion of (x + 6)*(x – 9) ? x² -3x -54

6. What is the expansion of (x + 4)² ? x² + 8x + 16

7. What is the expansion of (x – a)*(x + a) ? x² –a²