Solving Quadratic Equations : 3
Solve to 2 decimal places
1. x² + 3x – 7 = 0
2. x² - 5x – 3 = 0
3. x² + x – 4 = 0
4. x² - 7x + 1 = 0
5. x² + 6x + 2 = 0
6. 2x² -5x – 2 = 0
7. 3x² + 6x + 1 = 0
8. 5x² - 8x – 3 = 0
9. 8x² + 12x + 3 = 0
Solve these to 1 decimal place. (Rearrange first)
1.
2.
3.
4.
5.
4x² = 7x + 4
5x² -9 = 8x
8x = x² + 1
9 = 9x – 2x²
8x² + 9x = 3