state whether each of the following equations represent a quadratic function or not.justify your answer.
equation. yes or no. justify.
1,y=x²+3
2,y=4x-5
3,y=18-3x²
4,y=3(smallx)+3
5,y=4x²+x³+4
6,y=3(smallx)+4x+2
7,y=3x³
8y=(x-1)(x+9)
9(x-2)(x+2)+x²-y=0
10,0=y+5x³-3x
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Answer:
1. yes
2. no
3. yes
4. no
5. no
6. no
7. no
8. yes
9. yes
10. no