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1. a + b = 9m এবং ab = 18m হলে a - b = ?
- A. 3m
- B. 3m
- C. 3m
- D. 3m
Answer: Option D
Explanation:
( a - b)2 = ( a + b) 2 - 4ab
= (9m)2 - 4×18m
= 81m2 - 72m
a - b = + - 3m
Post your comments here:
1. a + b = 9m এবং ab = 18m হলে a - b = ?
Answer: Option D
Explanation:
( a - b)2 = ( a + b) 2 - 4ab
= (9m)2 - 4×18m
= 81m2 - 72m
a - b = + - 3m
Post your comments here: