Advertisements
Advertisements
प्रश्न
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
395
Advertisements
उत्तर
Decomposing: 395 = 400 − 5
Here, a = 400 and b = 5
Using the identity (a − b)2 = a2 − 2ab + b2:
3952 = (400 − 5)2 = 4002 − 2(400)(5) + 52 = 160000 − 4000 + 25 = 156025
APPEARS IN
संबंधित प्रश्न
Find the square root of the following number by division method.
3481
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.
3250
Find the length of the side of a square whose area is 441 m2.
Find the square of the following numbers using the identity (a + b)2 = a2 + 2ab + b2:
209
Find the squares of the following numbers using the identity (a − b)2 = a2 − 2ab + b2:
498
Find the square of the following by long division method:
12544
Find the square root the following by long division method:
390625
Find the square root the following by long division method:
9653449
Find the square root of each of the following by long division method:
4008004
A greeting card has an area 90 cm2. Between what two whole numbers is the length of its side?
