Which of the following equations are quadratic function and which are not?
1. y = x² + 2
2. y = 2x - 10
3. y = 9 - 2x²
4. y = 2x + 2
5. y = 3x² + x³ + 2
6. y = 2x +3x + 2
7. y = 2 x²
8. y = (x-2) (x + 4)
9. 0 = (x-3)(x+3)+ x² -Y
10. 3x³ + y - 2x =0
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Step-by-step explanation:
1. quadratic
2. not
3. quadratic
4. no
5. no
6. no
7. yes
8. yes
9. yes
10. no