1 . x+y=7 এবং xy=10 হলে (x-y)2এর মান কত?
- A. ৩
- B. ৬
- C. ৯
- D. ১২
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2 . x+y=7
- A. 6
- B. 32
- C. 4
- D. 9
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3 . if x+y=7 and x^2+y^2 =25 then which of the following equals the value of x^3+y^3 ?
- A. 7
- B. 25
- C. 65
- D. 91
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4 . x+y=7
- A. 7
- B. 25
- C. 65
- D. 91
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5 . x+y=7, xy=12 হলে x-y=?
- A. 1
- B. 2
- C. 3
- D. 4
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6 . x+y=7
- A. 37
- B. 30
- C. 34
- D. 39
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7 . x+y=7
- A. 4
- B. 3
- C. 2
- D. 1
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8 . x+y=7
- A. 24
- B. 25
- C. 26
- D. 27
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