Number Quest · Masters (16+)
Quadratics
Circle the right answer.
1.Expand (x + 7)(x + 4). What is the coefficient of x?
3281211
2.Where does this graph cross the y-axis?
y = 6y = -5y = 5y = 1
3.What is the sum of the roots of x² − 6x + 9 = 0?
679-6
4.Expand (x + 2)(x + 7). What is the coefficient of x?
145910
5.Expand (x + 3)(x + 6). What is the coefficient of x?
931018
6.This is the graph of y = x² + x − 6. Use it to solve x² + x − 6 = 0. What is the larger value of x?
-32-6-2
7.Expand (x + 2)(x + 3). What is the coefficient of x?
4561
8.If x² = 36 and x > 0, what is x?
96-618
9.Expand (x + 6)(x + 4). What is the coefficient of x?
1110242
10.This is the graph of y = x² + 2x − 8. Use it to solve x² + 2x − 8 = 0. What is the larger value of x?
-42-2-8
11.Where does this graph cross the x-axis?
x = -1 and x = 1x = 0 and x = 2x = -2 and x = 0x = -1 and x = -1
12.This is the graph of y = −x² + 7x − 10. Use it to solve −x² + 7x − 10 = 0. What is the larger value of x?
5-5-102
13.What is the sum of the roots of x² − 15x + 54 = 0?
1554-1516
14.If x² = 25 and x > 0, what is x?
-5512.56.25
15.Expand (x + 1)(x + 1). What is the coefficient of x?
3142
16.Where does this graph cross the y-axis?
y = 3y = -2y = 2y = -1
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Answers · Quadratics
- 1. 11
- 2. y = 5
- 3. 6
- 4. 9
- 5. 9
- 6. 2
- 7. 5
- 8. 6
- 9. 10
- 10. 2
- 11. x = -1 and x = 1
- 12. 5
- 13. 15
- 14. 5
- 15. 2
- 16. y = 2