# Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set: 156

To multiply two numbers with different signs, multiply their absolute values. Their product will be negative. (refer to the step-by-step part for an example)

#### Work Step by Step

To multiply two numbers with different signs, multiply their absolute values. The product is negative. Example: $(-3)(9)$ Multiply their absolute values: $|-3| \times |9| = 3 \times 9 = 27$ The product must be negative, so: $(-3)(9)=-27$

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