Can someone help with the even questions on this page? Some of them are confusing to me.

Solve each equation by finding square roots. 1. 3x = 75 2. 5x2- 45 = 0 3. 4x2 - 49 = 0 4. 612= 216 5. 2x2 = 14 6. 3x2- 96 = 0 7. A box is 4 in. high. Its length is 1.5 times its width. The volume of the box is 1350 in.2. What are the width and length of the box? Solve each equation. 8. x2 + 12x + 36 = 25 9. x2 - 10x + 25 = 144 10. x2 + 6x + 9 = 49 11. x2 - 22x + 121 = 225 12. 16x2 + 8x + 1 = 16 13. 25x2 - 30x + 9 = 81 Complete the square. 14. x2+ 22x + 15. x2 - 30x + 16. x2+ 5x + 17. x2 - 5x + 18. 25x2 + 10x + 19. 4x2 - 12x + Solve each quadratic equation by completing the square. 20. x2 + 10x - 1 = 0 21. x2 + 2x - 7= 0 22. -x2+ 6x + 10 = 0 23. x2 + 5x = 3x + 11 24. 3x2 + 4x = 2x2+ 3 25. x2 - 2x - - = 26. -0.2x2 + 0.4x + 0.8 = 0 27. 4x2 + 20x + 1 = 0