Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 0 - Section 0.3 - Multiplying and Factoring Algebraic Expressions - Exercises: 5


$x^{2} -2x-3$

Work Step by Step

$(x+1)(x-3)$ 1. Multiply the terms that occur first in each bracket. $(x)(x) = x^{2}$ 2. Multiply the outermost terms in each bracket. $(x)(-3) = -3x$ 3. Multiply the innermost terms in each bracket. $(1)(x) = x$ 4. Multiply the last terms in each bracket. $(1)(-3) = -3$ 5. Add all the answers in steps 1-4 to get $x^{2} -3x+x-3$. 6. Simplify to get $x^{2} -2x-3$.
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