Advertisements
Advertisements
प्रश्न
The difference of the squares of two consecutive numbers is their sum.
पर्याय
True
False
Advertisements
उत्तर
This statement is True.
Explanation:
Let two consecutive numbers be x and (x + 1).
Then squares of these numbers are x2 and (x + 1)2.
Difference of squares of these consecutive numbers = (x + 1)2 – x2
= x2 + 1 + 2x – x2 ...[∵ (a + b)2 = a2 + b2 + 2ab)
= 2x + 1
= x + x + 1
= (x) + (x + 1)
= Sum of the two consecutive numbers x and x + 1
Thus, difference of squares of two consecutive numbers = sum of the same consecutive numbers.
APPEARS IN
संबंधित प्रश्न
Simplify (7m − 8n)2 + (7m + 8n)2
Using identities, evaluate 992
Using identities, evaluate 8.92
Expand (5a + 6b)2
Use the formula to multiply the following.
(x + y) (x − y)
Use the formula to find the value.
98 × 102
Expand:
(10 + y)2
Use a formula to multiply of (4z – 5y)(4z + 5y)
Simplify: (a + b)2 + (a – b)2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 14x + 49
