Which expession is equal to 2 −28 − − − − √ 2−28 ? 4 7i − − √ 47i 4i 7 √ 4i7 −4 7 √ −47 −4i 7 √

Do problems 1-4, 11, 12 from appendix G in the book (page A47). ... Solution. 8 − 4i. (2.) (4 − 1. 2i) − (9 + 5. 2 i). Solution. −5 − 3i. (3.) (2 + 5i)(4 − i) ... Solution. 1, i, −1, and −i. 4. Write the product (. √3. 2. + 1. 2 i)(1. 2. +. √3. 2 ... (7.) 1+4i. 3+2i. Solution. 1+4i. 3+2i. = 1+4i. 3+2i · 3−2i. 3−2i. = 3−2i+12i−8i2 i)8 = 28e8· 5π. 6.