How to find the square of a number without actual multiplication?
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use this method then
like I take the example :sq of 89
U have studied in your factorization chapter
like:
(a+b) sq = a sq+b sq +2ab
so split 89
80+9
80 sq + 9 sq +2*80*9
6400+81+1440
add this
ans. 7881
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