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1. 2a2+7ab-15b2

  • A. (a+5b)(2a-3b)
  • B. (a+5b)(2a-3b)
  • C. (a+5b)(2a-3b)
  • D. (a+5b)(2a-3b)

Answer: Option A

Explanation:

2a²+7ab-15b²

=2a²+10ab-3ab-15b²

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

=(2a-3b)(a+5b).


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