Discuss Forum

1. x3-8y3-18xy

  • A. 27
  • B. 27
  • C. 27
  • D. 27

Answer: Option A

Explanation:

দেওয়া আছে, 

        x - 2y = 3 

প্রদত্ত রাশি,

        x3 - 8y3 - 18xy

      = x3 - (2y)3 - 18xy

      = (x - 2y)3 + 3 . x. 2y (x - 2y) - 18xy

      = (3)3 + 6xy . 3 - 18xy

      = 27 + 18xy - 18xy

      = 27 

উত্তর: 27 

Post your comments here:

Name:
Mobile:
Email:(Optional)

» Your comments will be displayed only after manual approval.