Advertisements
Advertisements
प्रश्न
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
995
उत्तर
Decomposing: 995 = 1000 − 5
Here, a = 1000 and b = 5
Using the identity (a − b)2 = a2 − 2ab + b2:
9952 = (1000 − 5)2 = 10002 − 2(1000)(5) + 52 = 1000000 − 10000 + 25 = 990025
APPEARS IN
संबंधित प्रश्न
Find the square root of the following number by division method.
1024
Find the least number which must be subtracted from the following number so as to get a perfect square. Also find the square root of the perfect square so obtained.
1989
Find the squares of the following numbers using the identity (a − b)2 = a2 − 2ab + b2:
498
Find the square root the following by long division method:
9653449
Find the square root the following by long division method:
20657025
Find the square root of 7.832 correct to: 2 decimal places
Squares of which of the following numbers will have 1 (one) at their unit’s place :
(i) 57
(ii) 81
(iii) 139
(iv) 73
(v) 64
The square root of a perfect square of n digits will have `((n + 1)/2)` digits, if n is odd.
Find the square root of the following by long division method.
1369
Find the square root of the following by long division method.
1.44
