tips menghitung kwadrat dua digit

contoh 32 x 32 = 1024, caranya :

32
32

3 x 3 = 09
3 x 2 + 3 x 2 = 12
2 x 2 = 04

09
1 2
0 4
______ +
1024

contoh 2 : 43 x 43

43
43

4 x 4 = 16
4 x 3 + 4 x 3 = 24
3 x 3 = 09

16
24
09
____+
1849


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