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Grade: 9
        
if x = 3 + 2 root 2 then value of root x + 1/ root x =
4 years ago

Answers : (2)

Akshay
185 Points
							
3+rt2 = (1+rt2)2, hope that will help
ATB
4 years ago
Manoj
13 Points
							
1/x=1/3+^2*3-2^2/3-2^2=3-2^2/(3)^2-(2^2)^2=3-2^2/9-8=3-2^2.                                                             
(^x-1/^x)^2=x-1/x+2=(3+2^2)+(3-2^2)+2=8.                                                                                                  
So,(^x-1/^x)^2=^8-2^2=2^2
one year ago
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