Solve and determine the solutions of each quadratic equations.

1. x²=4 x= ________ ; ________

2. x²=100 x=_________ ; ________

3. x²=64 x=_________ ; ________

4. x²=-49 x=_________ ; ________

5. x²+4=4 x=_________ ; ________

6. 2x²=8 x=_________ ; ________

7. 4x²=100 x=_________ ; ________

8. 2x²=32 x=_________ ; ________

9. x²=-9 x=_________ ; ________

10. x²+16=16 x=________ ; ________​