a²−3a,a³−9aএবংa³−4a²+3a এর গ.সা.গু=?

A a(a-3)

B a-3

C a

D a(a+3)

Solution

Correct Answer: Option A

প্রথম রাশি,
  a2-3a
=a(a-3)

দ্বিতীয় রাশি,
  a3-9a
=a(a2-32)
=a(a+3)(a-3)

তৃতীয় রাশি,
 a3-4a2+3a
=a(a2-4a+3)
=a(a2-3a-a+3)
=a{a(a-3)-1(a-3)}
=a(a-3)(a-1)

তিনটি রাশির গ সা গু =a(a-3)

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