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`        Question number 3.Find the value of x3+7x2-x+16, where  x= 1+2i`
2 years ago

Arun
23389 Points
```							Dear Swati x = 1 +2ihencex – 1 = 2isquaring the both sides x^2 + 1 – 2x = – 4hencex^2 – 2x + 5 = 0 now divide the given polynomial by ( x^2 – 2x + 5 ) , remainder will be the answer. RegardsArun (askIITians forum expert)
```
2 years 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