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Find (a) the center (h, k) and radius r of each circle; (b) graph each circle; (c) find the intercepts if any of the equation2x2+8x+2y2=0

Short Answer

Expert verified

a) center (h ,k), and the radius of the given equation are (-2,0) and 2

b) graph of the given equation is given below

Step by step solution

01

Part (a) step 1. Given information  

Given the equation of the circle is 2x2+8x+2y2=0

We have to Find (a) the center (h, k) and radius r of circle

02

 Part (a) Step 2. Rewriting the equation of a circle   

Here equation is in the form2x2+8x+2y2=0x2+4x+y2=0dividingby2getequationinstandardform(x2+4x)+y2=0

03

Part (a) step 3.  Find center and radius  

complete the square of each expression in parentheses, we get an

(x2+4x)+y2=0(x2+4x+4)+y2=4,sinceanynumberaddedontheleftsidemustaddtorightside(x+2)2+(y-0)2=22sothisstandardformofthecircleequaionwithcenterandradiushencecenteris(-2,0)andradiusis2.

Here x intercept and y intercept are both at 0.

04

Part (b)  step 1. Given information

Here given equation of a circle is2x2+8x+2y2=0

We need to sketch the graph

05

 Part (b) step 2. Graph of the equation of the circle  

the graph of the given equation with center(-2,0) and radius 2 is given below

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