Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.5 - Multiplying Polynomials - Exercise Set: 80

Answer

a) = 3x - 1 b) $= 40{x^2} - 31x + 6$

Work Step by Step

a) (8x - 3) - (5x - 2) = 8x - 3 -5x + 2 = 3x - 1 b) (8x - 3) (5x - 2) = 8x(5x) + 8x(-2) - 3(5x) - 3(-2) $= 40{x^2} - 16x -15x + 6$ $= 40{x^2} - 31x + 6$ Difference between (a) and (b): a) is subtraction. Numerical coefficents of like/similar terms are being subtracted. b) is multiplication. All terms, similar or not, are multiplied.
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