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1. x2+25y2

  • A. 25xy
  • B. 25xy
  • C. 25xy
  • D. 25xy

Answer: Option C

Explanation:

Given,

x2+25y2

or, x2+(5y)2 

or, x2+2.x.5y+(5y)210xy

or,(x+5y)210xy

অর্থাৎ, x2+25y2এর সাথে 10xy যোগ করলে যোগফল পূর্ণবর্গ রাশি হবে। Answer.


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