Advertisements
Advertisements
Question
Factorise : 4a2 - 49b2 + 2a - 7b
Sum
Advertisements
Solution
4a2 - 49b2 + 2a - 7b
= [ ( 2a )2 - ( 7b )2] + [ 2a - 7b ]
= [ 2a - 7b ][ 2a + 7b ] + [ 2a - 7b ] [ ∵ a2 - b2 = ( a + b )( a - b ) ]
= [ 2a - 7b ][ 2a + 7b + 1 ]
shaalaa.com
Method of Factorisation : Difference of Two Squares
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Factorise : a2 - 81 (b-c)2
Factorise : 25(2a - b)2 - 81b2
Factorise : 4xy - x2 - 4y2 + z2
Factorize : 9a2 - (a2 - 4) 2
Factorise : `4x^2 + 1/(4x)^2 + 1`
Factorise the following by the difference of two squares:
x2 - 16
Factorise the following by the difference of two squares:
64x2 - 121y2
Factorise the following by the difference of two squares:
16a4 - 81b4
Factorise the following:
4x2 - 12ax - y2 - z2 - 2yz + 9a2
Express each of the following as the difference of two squares:
(x2 - 2x + 3) (x2 - 2x - 3)
