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```
w is the cubic root of unity then root w+ root w^2=?

```
11 months ago

2069 Points
```							w^3=1w^3 – 1= 0(w – 1)(w^2+w+1)= 0assuming w is not 1 itselfw^2+w+1= 0or w^2+w= – 1 now, let x= root w+ root w^2x^2 = w + w^2 + 2root(w^3)= – 1 + 2root(1)= 1so x= ± 1kindly approve :))
```
11 months ago
Arun
25236 Points
```							Dear student w^3 = 1 w^3 – 1 = 0(w – 1) (w^2 + 1 + w) = 0 hence w + w^2 = -1 only Hope it helps Regards
```
11 months ago
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• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions