Question:m = 6, n = 7 হলে `16(m^2 + n^2)^2 + 56(m^2 + n^2) (3m^2 - 2n^2) ` `+ 49(3m^2 - 2n^2)^2` এর মান নির্ণয় কর। 

Answer দেওয়া আছে, m = 6 এবং n = 7 প্রদত্ত রাশি :.` = 16(m^2 + n^2)^2 + 56 (m^2 + n^2) (3m^2 - 2n^2) ` `+ 49 (3m^2 - 2n^2)^2` `= {4(m^2 + n^2)}^2 + 2. 4(m^2 + n^2) 7(3m^2 - 2n^2)` `+ {7 (3m^2 - 2n^2)}^2` `= {4(m^2 + n^2) + 7(3m^2 - 2n^2)}^2` `= (4m^2 + 4n^2 + 21m^2 - 14n^2)^2` `= (25m^2 - 10n^2)^2` `= (25. 6^2 - 10. 7^2)^2` [m = 6 এবং n = 7 বসিয়ে] `= (25. 36 - 10. 49)^2` `= (900 - 490)^2` `= (410)^2` = 168100 :. নির্ণেয় মান = 168100 : 168100 

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m = 6, n = 7 hole `16(m^2 + n^2)^2 + 56(m^2 + n^2) (3m^2 - 2n^2) ` `+ 49(3m^2 - 2n^2)^2` ar man nirony karo.
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