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CBSE Class 9 Answered

Factorise (i) (2a +b) whole square -6a-3b-4 (ii) a square - (2a+3b) whole square
Asked by | 04 Nov, 2012, 12:31: PM
answered-by-expert Expert Answer
(i)
(2a +b)2 - 6a - 3b - 4
= (2a +b)2 - 3(2a + b) - 4
= (2a +b)(2a + b - 3) - 4
= (2a +b)(2a + b - 3) - 4
 
(ii) a2 - (2a + 3b)2
= (a + 2a + 3b)(a - 2a - 3b)
= (3a + 3b)(-a - 3b)
Answered by | 04 Nov, 2012, 09:44: PM
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