leave 9 , now multiply the (first part) with (first part+1). put the result in first
then add (8* first part) with the first digit of (9^2 or 81) that means with 8.if here an excess is present then add that with the result of multiplication.
and at last put 1
..................................................................................
EX:-
19^2= (1*2) (8*1+8) 1 = (2+1) 6 1 = 361
119^2= (11*12) (8*11+8) 1 =(132+9) 6 1 = 14161
then add (8* first part) with the first digit of (9^2 or 81) that means with 8.if here an excess is present then add that with the result of multiplication.
and at last put 1
..................................................................................
EX:-
19^2= (1*2) (8*1+8) 1 = (2+1) 6 1 = 361
119^2= (11*12) (8*11+8) 1 =(132+9) 6 1 = 14161
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