University:
High School
Course:
High School Algebra
Academic year:

2019
Views:

498

Pages:

2
Author:

Mariela Lopez

Practice А (attach all necessaтy woгk fог full cгedit) ln Exercises 1-3, find the square root of the number. 2. 1. � ✓-81 З. ,J=зi. ln Exercises 4-7, find the values of х and у that satisfy the equation. 4. 5х + 3i = 15 + yi 5. -бх + lOi = 12 + 2yi 6. х + 2yi = 13 + 8i 7. 3х + 50i = 18 - Syi - (4 + Зi) 11. (7 - 4i) - (10 - Зi) ln Exercises 8-11, add or suЬtract. Write the answer in standard form. 8. (з + 2i) + (5 + 7i) 9.(4 - Зi) + (9 + 2i) 1 О. (6 + Si) 12. Write each expression as а complex number in standai-d form. ь. ✓-27 + � - ✓-64 ln Exercises 13-16, multiply. Write the answer in standard to,·m. 14. Зi(8 - Зi) 13. Si(-4 + 2i) 17. Justify each step ln performing the operation. 14 + (5 - Зi) - 4i [(14 + 5) - 15.(2 - i)(з + i) 16. (4 + 6i)(9 - 2i) ln Exercises 18 and 19, find the zeros of the function. 18.f(x) = 5х 2 + 15 з,J - 4i (19 __: Зi) - 4i 19 + (-Зi - 4i) 19 - 7i In Exercises 20 and 21, solve tl1e equation. Check your solution(s). 20. х2 + 36 = О 21. х2 + 6 = -14 19. g(x) = 3х 2 + 21 Puzzle Time Write the letter of each answer in tl1e Ьох containing the exercise numbel". (attach all work for full credit) Solve the equation using factoring, square roots, or completing the square. 1. (х 2 + 8) = 25 2. 2х2 - 12х + 6 = О Answers З. х2 - Sx + 15 = О 4. х 2 - К 45 = О х = 3; х = -1 Е. х=2;х=-2 5 3 N. х = --; х = 2 5. 3х2 - х = 10 6. 9.х 2 + 79 = -18х N. х = 3 + б L. х = 3; х = 5 5 i Зх 2 = -4 + 8х 8. х2 - 1. х = ±3 ✓ 2х = 3 Е • х = -1 + -J70l. - 9. 4х + 8х + 80 = О 2 2 10. -8 - 8х = -31 3 5. х= 2;х = 3 А. х = -1 ± i-✓19 т. 11. 2х2 - 2 = 6 12. -4х 2 + бх - 16 = -5х2 х= б ✓; х = 3 - ✓ ±...f46 о. х = -3;х = -13 R. х = 2;х = -8