Mr. Hillbert writes the expression (3+I)(7-2i) on the board and ask his students to rewrite it using the distributive property the work of two students is shown below which student simplified the expression correctly what mistake did the other student make Student 1 (3 + I)(7 - I) = 21 - 3i + 7i -i^2 = 21 + 4i + 1 = 22 + 4i Student 2 (3 + I)(7 - I) = 21 - 3i + 7i - i^2 = 21 + 4i - 1 = 20 + 4i

Mr. Hillbert writes the expression (3+I)(7-2i) on the board and ask his students to rewrite it using the distributive property the work of two students is shown below which student simplified the expression correctly what mistake did the other student make Student 1 (3 + I)(7 - I) = 21 - 3i + 7i -i^2 = 21 + 4i + 1 = 22 + 4i Student 2 (3 + I)(7 - I) = 21 - 3i + 7i - i^2 = 21 + 4i - 1 = 20 + 4i

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

ChapterP: Prerequisites

Section: Chapter Questions

Problem 3CC

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