MCQ
$r^2-10 r+21$ का गुणनखंडित रूप है-
  • A
    (r-1)(r-4)
  • (r-7)(r-3)
  • C
    (r-7)(r+3)
  • D
    (r+7)(r+3)

Answer

Correct option: B.
(r-7)(r-3)
(b)

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