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1. a + b = 14, ab = 45 হলে a - b এর মান কত?
- A. -4
- B. -4
- C. -4
- D. -4
Answer: Option B
Explanation:
ab = (a+b)2-(a-b)2
or, (a-b)2 = (a+b)2-4ab
=(14)2 -(4X45)
=196 - 180
=16
(a-b)= ± 4
Post your comments here:
1. a + b = 14, ab = 45 হলে a - b এর মান কত?
Answer: Option B
Explanation:
ab = (a+b)2-(a-b)2
or, (a-b)2 = (a+b)2-4ab
=(14)2 -(4X45)
=196 - 180
=16
(a-b)= ± 4
Post your comments here: