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Elementary Algebra

Lynn Marecek, MaryAnne Anthony-Smith

$Math Studyset 91影视 Explanations$ Math

2nd Edition 路 1240 pages

ISBN: 9780998625713

Chapter 9: Q. 149 (page 1063)

In the following exercise, simplify: $9 \sqrt{7} - 10 \sqrt{7}$

Short Answer

Expert verified

The solution is $- \sqrt{7} .$

Step by step solution

01

Step 1. Given information

Roots: $9 \sqrt{7} - 10 \sqrt{7}$

02

Step 2. Calculation

We have,

$9 \sqrt{7} - 10 \sqrt{7} = - \sqrt{7}$

Since the radicals are like, we subtract the

coefficients.

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