Factorisation - the Quadratic formula.
Test Yourself 1.
Solve the following equations - when possible - using the quadratic formula.
When necessary, write your
answer in the simplest surd form.
REMEMBER: always write out the values for the coefficients TOGETHER with their signs
and always use brackets to enter the values in your calculator!!!
3 term monics. | 1. x2 + 10x + 9 = 0 | 2. z2 - 3z - 10 = 0 |
3. x2 - x - 12 = 0 | 4. a2 + 20a + 100 = 0 | |
5. y2 + 5y +7 = 0 | 6. x2 - 8x + 1 = 0 | |
3 term non-monics. | 7. 3x2 + 7x + 2 = 0 | 8. 8x2 - 14x + 3 = 0 |
9. 5d2 - 9d + 2 = 0 | 10. 3x2 - 6x + 8 = 0 | |
11. 2c2 - 9c + 8 = 0 | 12. 6x2 = x - 3 | |
2 term quadratics. | 13. x2 + 5 = 0 | 14. b2 + 7b = 0 |
15. x(x - 4) = 0 | 16. m2 - 12 = 0 | |
Other formats. | 17. x2 - 2x + 1 = 3x + 6. | 18. |
19. 2x2 = 7x - 2 | 20. | |
21. | 22. |