Solving quadratics of the form ax2 + bx + c = 0 − using the quadratic formula
Solving quadratics of the form ax2 + bx + c = 0 using the quadratic formula:
| x = |  |
Example 1. Solve 2x2 + 12x + 10 = 0
Example 2. Solve 4x2 − 11x + 6 = 0
Example 3. Solve 2x2 + 2x − 24 = 0
Example 4. Solve 3x2 − 4x − 20 = 0
| x = | |
Verify by putting these two values of x into 2x2 + 12x + 10
| x = | |
Check by putting these two values of x into 4x2 − 11x + 6
| x = | |
Verify by putting these two values of x into 2x2 + 2x − 24
| x = | |
Check by putting these two values of x into 3x2 − 4x − 20
Remember:
Find the values of x where ax2 + bx + c = 0 is the same as solve ax2 + bx + c = 0
to: 
