Answer
$AD=25$
$DB=11.25$
Work Step by Step
$Given,$
$CD=\sqrt (AD)(DB)$
$a]$
$10=\sqrt (AD)(4)$
Squaring,
$100=4(AD)$
$AD=\frac{100}{4}=25$
$b]$
$15=\sqrt (20)(DB)$
Squaring,
$225=20(DB)$
$DB=\frac{225}{20}=11.25$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-4 Solving Radical Equations - Practice and Problem-Solving Exercises - Page 624: 39
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