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`        If x +1/x=-1 then the value of x8 + 2x6 + x4 is... plz explain properly `
9 months ago

Saurabh Koranglekar
4080 Points
```							Dear studentx^4( x^4 +2 x^2 +1)x^4 ( -x)*(-x)x^6But given is x^2 = -1-xx^6 = -(1+x)^3-x^3 -1-3x(1+x)-x^3 -1 + 3x^32x^3 -12(-x-x^2) -1-2x-2x^2 -1-2x^2 + 2x^2 = 0Regards
```
9 months ago
Arun
23811 Points
```							Dear student it can be written as x^8 + x^6 + x^6 + x^4 x^6 (x^2 + 1) + x^4 (x^2 + 1) x^4 ( x^2 + 1) (x^2 + 1) = x^4 ( -x) (-x)  = x^6
```
9 months ago
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### Course Features

• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions