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1. a2-3a,a3-9a
- A. a(a-3)
- B. a(a-3)
- C. a(a-3)
- D. a(a-3)
Answer: Option B
Explanation:
a² - 3a = a ( a - 3) a² - 9 = a² - 3² = (a+3) (a-3) a² - 4a + 3 = a² - 3a - a + 3 = a (a-3) - 1 (a-3) = (a-3) (a-1) নির্ণেয় গ.সা.গু = (a-3)
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