Advertisements
Advertisements
Question
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
4x2 – 25y2
Sum
Advertisements
Solution
We have,
4x2 – 25y2 = (2x)2 – (5y)2
= (2x – 5y)(2x + 5y)
shaalaa.com
Is there an error in this question or solution?
Chapter 7: Algebraic Expression, Identities and Factorisation - Exercise [Page 235]
APPEARS IN
RELATED QUESTIONS
Expand: (3x + 4y)(3x - 4y)
Factorise : 16p4 – 1
The product of (x + 5) and (x – 5) is ____________
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
z2 – 16
Factorise the following algebraic expression by using the identity a2 – b2 = (a + b)(a – b)
25a2 – 49b2
The value of (a + 1)(a – 1)(a2 + 1) is a4 – 1.
Factorise the following using the identity a2 – b2 = (a + b)(a – b).
9x2 – 1
Verify the following:
(p – q)(p2 + pq + q2) = p3 – q3
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
