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: 1 - 100a2
Factorise: a4 - (a2 - 3b2)2
Factorise: 25(2x + y)2 - 16(x - y)2
Factorise: `(7 3/10)^2 - (2 1/10)^2`
Factorise: (0·7)2 - (0·3)2
Factorise: 75(x + y)2 - 48(x - y)2
Factorise: a2 + 4a + 4 - b2
factorise: x2 + 6x + 9 - 4y2
factorise : 25(2x - y)2 - 16(x - 2y)2
Factorise: `9x^2 - 1/16`
