Question
Sun November 04, 2012 By:
 

Factorise (i) (2a +b) whole square -6a-3b-4 (ii) a square - (2a+3b) whole square

Expert Reply
Sun November 04, 2012
(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)
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