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1644 . 3x-7y+10=0 এবং y-2x-3=0 এর সমাধান ----

  • A. x=1, y= -1
  • B. x=1, y= 1
  • C. x=-1, y= -1
  • D. x=-1, y= 1
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1649 . x-y=1, xy=56 হলে x+y= কত?

  • A. ১৬
  • B. ১৫
  • C. ২২৫
  • D. ২২১
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