(iii)
t square +3t+1, 3t4 + 513 +2+2t - 7 square .divide 2nd poly by 1st ploy
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Answer:
No of squares in n x n square= n x (n+1) x (2n+1)/6.
as n= 7
= 7(7+1)(2 x 7 + 1)/6
= 140.
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