   Chapter 5.1, Problem 39E Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Solutions

Chapter
Section Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

Find a) the exact length of an ideal rectangle with width W = 5 by solving 5 L = L − 5 5 . b) the approximate length of an ideal rectangle with width W = 5 by using L ≈ 1.62 W

To determine

a)

To Find:

The exact length of an ideal rectangle.

Explanation

According to the quadratic formula, the solutions of ax2 + bx + c = 0 are given by

x=b+b24ac2a,bb24ac2a

Calculation:

Consider, 5L=L55

L(L5)=55L25L=25L25L25=0

Use the quadratic formula in L25L25=0.

L=(5)+(5)24(1)(

To determine

b)

To Find:

The approximate length of an ideal rectangle.

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