Advertisements
Advertisements
प्रश्न
Find the squares of the following numbers using the identity (a + b)2 = a2 + 2ab + b2:
405
Advertisements
उत्तर
On decomposing:
405 = 400 + 5
Here, a = 400 and b = 5
Using the identity (a + b)2 = a2 + 2ab + b2:
4052 = (400 + 5)2 = 4002 + 2(400)(5) + 52 = 160000 + 4000 + 25 = 164025
APPEARS IN
संबंधित प्रश्न
Find the square root of the following number by division method.
1024
Find the number of digits in the square root of the following numbers (without any calculation).
64
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
495
Find the square of the following number using the identity (a − b)2 = a2 − 2ab + b2:
99
Find the square of the following number by visual method:
702
Write the prime factorization of the following number and hence find their square root.
7056
Find the square of the following by long division method:
12544
Find the square root of the following by long division method:
3915380329
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 square root of: `(1764)/(2809)`
