Answer:
1. D
2. A
3. A
4. D
5. C
6. A
7. A
8. B
9. A
10. C
1. x²-6
2. x²y² + 3xy +9
3. (x-4)(x+4)
the other roots are: -3/2 and 3/2
the width of the rectangle is x+7
