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1. a+b=7 , ab = 10 হলে ( a − b ) 2 =?
- A. 9
- B. 9
- C. 9
- D. 9
Answer: Option A
Explanation:
(a - b)² = (a + b)² - 4ab
= 7² - 4×10
= 49 - 40
= 9
Post your comments here:
1. a+b=7 , ab = 10 হলে ( a − b ) 2 =?
Answer: Option A
Explanation:
(a - b)² = (a + b)² - 4ab
= 7² - 4×10
= 49 - 40
= 9
Post your comments here: