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Use the identity and find the square of 189. (a – b) 2 = a 2 – 2ab + b 2

```
2 months ago

Anand Kumar Pandey
2803 Points
```							Dear Student189 = (200 – 11)^2= 40000 – 2 x 200 x 11 + 11^2= 40000 – 4400 + 121= 35721Thanks
```
2 months ago
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### Course Features

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