Advertisements
Advertisements
Question
Factorise: a2 - b2 - 2b - 1
Sum
Advertisements
Solution
a2 - b2 - 2b - 1
= a2 - (b2 + 2b + 1)
...[(a + b)2 = a2 + b2 + 2ab]
...[a2 - b2 = (a + b) (a - b)]
= (a)2 - (b + 1)2
= (a + b + 1)(a - b - 1)
shaalaa.com
Factorisation by Difference of Two Squares
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Factorise: `4/25 - 25b^2`
Factorise: 49(x - y)2 -9(2x + y)2
Factorise: `(7 3/10)^2 - (2 1/10)^2`
Factorise: (0·7)2 - (0·3)2
Factorise: (4.5)2 – (1.5)2
Factorise: 75(x + y)2 - 48(x - y)2
factorise : 16(5x + 4)2 -9(3x - 2)2
Factorise: `9x^2 - 1/16`
factorise: 25(x - 2y)2 - 4
Factorise: 25(a - 5b)2 - 4(a - 3b)2
