Advertisements
Advertisements
प्रश्न
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
`x^2/25 - 625`
उत्तर
We have,
`x^2/25 - 625 = (x/5)^2 - (25)^2`
= `(x/5 - 25)(x/5 + 25)`
APPEARS IN
संबंधित प्रश्न
(7x + 3)(7x – 4) = 49x2 – 7x – 12
Using suitable identities, evaluate the following.
(729)2 – (271)2
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).
`1/36a^2b^2 - 16/49b^2c^2`
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
x4 – y4 + x2 – y2
Factorise the expression and divide them as directed:
(3x2 – 48) ÷ (x – 4)
The base of a parallelogram is (2x + 3 units) and the corresponding height is (2x – 3 units). Find the area of the parallelogram in terms of x. What will be the area of parallelogram of x = 30 units?
Find the value of a, if pqa = (3p + q)2 – (3p – q)2
Find the value of a, if pq2a = (4pq + 3q)2 – (4pq – 3q)2
Find the value of `(6.25 xx 6.25 - 1.75 xx 1.75)/(4.5)`
