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Find all values of x such​ that \(\sqrt{4x^2} - \sqrt{x^2} = 6\)

 

Please help me asap! I appreciate your help!

 Nov 3, 2018
edited by Web2.0CalcUser123  Nov 3, 2018
 #1
avatar+98042 
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sqrt (4x^2) - sqrt (x^2)  = 6       we can write

 

2sqrt (x^2)  - sqrt (x^2)  =  6

 

sqrt (x^2) = 6     square both sides

 

x^2  =  36      take both roots

 

x = ± 6

 

 

cool cool cool

 Nov 3, 2018
 #2
avatar+78 
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CPhill, when I entered your answer, it said that 6 is wrong.....

Can you re-answer?

 Nov 3, 2018
edited by Web2.0CalcUser123  Nov 3, 2018

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