2a² + 7ab - 15b² এর উৎপাদক বিশ্লেষণ কত হয়?

A (a + 5b)(2a - 3b)

B (a - 5b)(2a + 3b)

C (a - 5b)(2a - 3b)

D (a - 5b)(a + 5b)

Solution

Correct Answer: Option A

2a²+7ab-15b²
=2a²+10ab-3ab-15b²
=2a(a+5b)-3b(a+5b)
=(a+5b)(2a-3b)

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