Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.7 Complete the Square - 4.7 Exercises - Quiz for Lessons 4.5-4.7 - Page 291: 10

Answer

$-78-62i$

Work Step by Step

$(8-3i)(-6-10i)\qquad$ ...use the FOIL method. $=8\cdot(-6)+8\cdot(-10i)+(-3i)\cdot(-6)+(-3i)\cdot(-10i)\qquad$ ...simplify. $=-48-80i+18i+30i^{2}\qquad$ ...simplify. ($i^{2}=-1$) $=-48-80i+18i-30\qquad$ ...group like terms. $=-48-30-80i+18i\qquad$ ...simplify. $=-78-62i$
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