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Chapter 11: Q. 48 (page 1083)

In the following exercises, (a) identify the center and radius and (b) graph.
x2+y2-14x+13=0

Short Answer

Expert verified

(a) The center and radius of the graph x2+y2-14x+13=0is (7,0) and the radius is r=6

(b) The graph of the function is:

Step by step solution

01

Part (a) Step 1. Given

The functionx2+y2-14x+13=0

To find the radius and center of the circle.

02

Part (a) Step 2. Group x,y-terms

Group the x-terms and y-terms. Collect the constants on the right side.

x2+y2-14x+13=0x2-14x+y2=-13

03

Part (a) Step 3. Complete the squares.

Complete the squares and write in binomial form.

(x2-14x+49)+y2-49=-13(x-7)2+y2=36

04

Part (a) Step 4. Identify the center and radius.

Identify the center and radius by comparing the equation with standard form of circle (x-h)2+(y-k)2=r2.

From the equation, the center(7,0) and the radius is r=6

05

Part (b) Step 1. Given

The functionx2+y2-14x+13=0

To graph the function

06

Part (b) Step 2. Graph the function

Graph the circle with center (7,0)and radius r=6

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