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1. a + b = 9p, ab = 18p2 হলে, (a - b) = কত?
- A. 4p
- B. 4p
- C. 4p
- D. 4p
Answer: Option C
Explanation:
(a+b)²=(a-b)²+4ab
Or, (9p)²=(a-b)²+4(18p²)
Or, (a-b)²=81p²-72p²=9p²
Or, a-b=3p
(ans)
Post your comments here:
1. a + b = 9p, ab = 18p2 হলে, (a - b) = কত?
Answer: Option C
Explanation:
(a+b)²=(a-b)²+4ab
Or, (9p)²=(a-b)²+4(18p²)
Or, (a-b)²=81p²-72p²=9p²
Or, a-b=3p
(ans)
Post your comments here: