Section 2.4 14, 18, 20 Question 14 4 + sqrt{-49} 4 + sqrt{49} • sqrt{-1} 4 + 7 • sqrt{-1} Let sqrt{-1} = I 4 + 7i Question 18 50 becomes 50 + 0i. Question 20 -2i^2 + 4i Let i^2 = -1 -2(-1) + 4i 2 + 4i You say? Can you do 22? [ATTACH=full]431[/ATTACH]