find the square root of 49 and 81 by the method of repeated subtraction
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49= 49-1 =48
48-3= 45
45-5= 40
40-7= 33
33-9 =24
24-11= 13
13-13 =0
perfect square of 49 is 7
81= 81-1= 80
80-3= 77
77-5= 72
72-7=65
65-9=56
56-11=45
45-13=32
32-15=17
17-17=0
so, the perfect square of 81 is 9
48-3= 45
45-5= 40
40-7= 33
33-9 =24
24-11= 13
13-13 =0
perfect square of 49 is 7
81= 81-1= 80
80-3= 77
77-5= 72
72-7=65
65-9=56
56-11=45
45-13=32
32-15=17
17-17=0
so, the perfect square of 81 is 9
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