4-4 Skills Practice Complex Numbers Simplify. 1. â99 2. â49 27 3. â52x y 3 5 4. ââ 108x 7 5. ââ 81x 6 6. ââ 23 · ââ 46 7. (3i)(-2i)(5i) 8. i 11 9. i 65 10. (7 - 8i) + (-12 - 4i) 11. (-3 + 5i) + (18 - 7i) 12. (10 - 4i) - (7 + 3i) 13. (7 - 6i)(2 - 3i) 14. (3 + 4i)(3 - 4i) 15. 3i 8 â 6i 16. 3i 4 + 2i Solve each equation. 17. 3x 3 = 0 2 + 18. 5x 125 = 0 2 + 19. 4x 20 = 0 2 + 20. â x 16 = 0 2 â 21. x 18 = 0 2 + 22. 8x 96 = 0 2 +Find the values of â and m that make each equation true.23. 20 - 12i = 5â + (4m)i 24. â - 16i = 3 - (2m)i 25. (4 + â) + (2m)i = 9 + 14i 26. (3 - m) + (7â - 14)i = 1 + 7i