Advertisements
Advertisements
प्रश्न
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
9x2 – 1
Advertisements
उत्तर
We have,
9x2 – 1 = (3x)2 – 12
= (3x – 1)(3x + 1)
APPEARS IN
संबंधित प्रश्न
Using suitable identities, evaluate the following.
(9.7)2 – (0.3)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
x2 – 9
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`x^2/9 - y^2/25`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`x^2/25 - 625`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`1/36a^2b^2 - 16/49b^2c^2`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
x4 – 1
The sum of first n natural numbers is given by the expression `n^2/2 + n/2`. Factorise this expression.
Find the value of a, if 9a = 762 – 672
Find the value of a, if pq2a = (4pq + 3q)2 – (4pq – 3q)2
The product of two expressions is x5 + x3 + x. If one of them is x2 + x + 1, find the other.
