Advertisements
Advertisements
प्रश्न
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
999
Advertisements
उत्तर
Decomposing: 999 = 1000 - 1
Here, a = 1000 and b = 1
Using the identity (a − b)2 = a2 − 2ab + b2:
9992 = (1000 − 1)2 = 10002 − 2(1000)(1) + 12 = 1000000 − 2000 + 1 = 998001
APPEARS IN
संबंधित प्रश्न
Find the square root of the following number by division method.
7921
Find the length of the side of a square whose area is 441 m2.
Find the squares of the following numbers using the identity (a + b)2 = a2 + 2ab + b2:
605
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
395
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
495
Find the square of the following number by visual method:
95
Find the square of the following number by visual method:
99
Find the square root the following by prime factorization.
1156
Write the prime factorization of the following number and hence find their square root.
7056
Find the square root the following by long division method:
20657025
