Advertisements
Advertisements
Question
Factorise: (a - 3b)2 - 36 b2
Sum
Advertisements
Solution
(a - 3b)2 - 36 b2
= (a - 3b)2 - (6b)2
= (a - 3b + 6b) (a - 3b - 6b)
= (a + 3b)(a - 9b) ....[a2 - b2 = (a + b)(a - b)]
shaalaa.com
Factorisation by Difference of Two Squares
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Factorise: 4x2 - 81y2
Factorise: 1 - 100a2
Factorise: (5a - 3b)2 - 16b2
Factorise: a4 - (a2 - 3b2)2
Factorise: 4(2a + b)2 - (a - b)2
Factorise: 49(x - y)2 -9(2x + y)2
Factorise: (0·7)2 - (0·3)2
factorise: 25(x - 2y)2 - 4
Factorise: 25(a - 5b)2 - 4(a - 3b)2
Factorise: 15(2x - y)2 - 16(2x - y) - 15
