Answer − Solving quadratics of the form ax2 + bx + c = 0 using the quadratic formula
1. Solve 2x2 + 10x + 8 = 0
| | x = |  |
Verify by putting these two values of x into 2x2 + 10x + 8
2. Find the values of x where 3x2 + 21x + 18 = 0
| | x = | |
Verify by putting these two values of x into 3x2 + 21x + 18
3. Solve 4x2 + 20x − 24 = 0
| | x = | |
Verify by putting these two values of x into 4x2 + 20x − 24
4. Find the values of x where 2x2 + 9x − 56 = 0
| | x = | |
Verify by putting these two values of x into 2x2 + 9x − 56
5. Solve 5x2 − 20x − 60 = 0
| | x = | |
Verify by putting these two values of x into 5x2 − 20x − 60
6. Find the values of x where 3x2 − 21x + 36 = 0
| | x = | |
Verify by putting these two values of x into 3x2 − 21x + 36
7. Solve 3x2 − 40x + 48 = 0
| | x = | |
Verify by putting these two values of x into 3x2 − 40x + 48
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