Mathematics Q4 Given i= the square root of negative 1i=-1, what is the square root of 9 end root + the square root of negative 169+-16? F 7i G i the square root of 7i7 H 3 minus 4i3-4i J 3+4i Reveal answer Correct answer: J Explanation F. Incorrect. Remember that you can only combine like terms. Try simplifying each radical individually and then only combining like terms.G. Incorrect. Remember that, in general, a+b≠a+b. Try simplifying each radical individually instead.H. Incorrect. You may have thought that -1=-i. Remember that -1=i.J. Correct. Take the square root of each term, and use -1=i to simplify: 9+-16=9+16-1=3+4i. ▶ Video explanation for this topic Loading… Searched on YouTube by reporting category, not by question text. Open this search on YouTube → Source: Official ACT practice questions © ACT Education Corp., from the QuizMe practice quizzes at quizme.act.org. Go to the official source → ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.