Answer
We need to multiply by (c).
Work Step by Step
We need to multiply by (c), $1+\sqrt{3}$ to rationalize the denominator ($1-\sqrt{3}$). because this will remove the root:
$(1+\sqrt{3})(1-\sqrt{3})=1^2-(\sqrt{3})^2=1-3=-2$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter R - Section R.8 - nth Roots; Rational Exponents - R.8 Assess Your Understanding - Page 78: 8
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