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```
using identity, solve:- 3a 7 b-81a 4 b 4
using identity, solve:- 3a7b-81a4b4

```
5 years ago

Latika Leekha
165 Points
```							Hello student,The given expression is 3a7b - 81a4b4Taking out common 3a4b we have 3a7b - 81a4b4= 3a4b (a3 – 27b3)= 3a4b (a – 3b)(a2 + 3ab + 9b2) (using the formula a3-b3 = (a-b)(a2+ab+b2)
```
5 years 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