B.State whether each of the following equatiobs represents a quadratic function or not

1. y=x²+2
2. y=2x-10
3. y=9-2x²
4. y=2×+2
5. y=3x²+x³+2
6. y=2×+3x+2
7. y=2x²
8. y=(x-2)(x+4)
9. 0=(x-3)(x+3)+x²-y
10. 3x³+y-2x=0
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