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Please post the solution of third question from the above image.

Please post the solution of third question from the above image.

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Grade:11

2 Answers

Arun
25750 Points
5 years ago
Dear student
 
May be its other methods also. But it can also be solved by expanding
 
As it will be a simple bi-quadratic equation.
 
 
Hope it helps
 
Regards
Arun
Aditya Gupta
2081 Points
5 years ago
(x^2-6x)^2= 81+2(x-3)^2
(x^2-6x)^2-9^2= 2(x-3)^2
(x^2-6x+9)(x^2-6x-9)= 2(x^2-6x+9)
So x=3 or x^2-6x-11=0 which you can easily find the roots by using quadratic formula

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