Advertisements
Advertisements
प्रश्न
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
495
उत्तर
Decomposing: 495 = 500 − 5
Here, a = 500 and b = 5
Using the identity (a − b)2 = a2 − 2ab + b2:
4952 = (500 − 5)2 = 5002 − 2(500)(5) + 52 = 250000 − 5000 + 25 = 245025
APPEARS IN
संबंधित प्रश्न
Find the number of digits in the square root of the following numbers (without any calculation).
390625
Find the least number which must be added to the following number so as to get a perfect square. Also find the square root of the perfect square so obtained.
1825
Find the square root the following by long division method:
286225
Find the square root the following by long division method:
82264900
Find the value of `sqrt5` correct to 2 decimal places; then use it to find the square root of `(3-sqrt(5))/(3+sqrt(5)` correct to 2 significant digits.
Find the greatest 4-digit number which is a perfect square.
Find the square root by long division method
6889
Find the square root by long division method
11025
A greeting card has an area 90 cm2. Between what two whole numbers is the length of its side?
`sqrt(1.96)` = ______.
