Advertisements
Advertisements
Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
4x2 – 49y2
Advertisements
Solution
We have,
4x2 – 49y2 = (2x)2 – (7y)2
= (2x – 7y)(2x + 7y)
APPEARS IN
RELATED QUESTIONS
(7x + 3)(7x – 4) = 49x2 – 7x – 12
Using identity, find the value of (1.9) × (2.1)
Multiply the following:
(a2 – b2), (a2 + b2)
Using suitable identities, evaluate the following.
(35.4)2 – (14.6)2
Using suitable identities, evaluate the following.
(132)2 – (68)2
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
3a2b3 – 27a4b
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
y4 – 81
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
(x + y)4 – (x – y)4
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
8a3 – 2a
Verify the following:
(a2 – b2)(a2 + b2) + (b2 – c2)(b2 + c2) + (c2 – a2) + (c2 + a2) = 0
