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CBSE Class 9 Answered

Factorise:5(2a+b)^2-(2a+b)-4
Asked by | 15 Oct, 2012, 07:19: PM
answered-by-expert Expert Answer
Answer : Given : 5(2a + b)2 - (2a + b) - 4
To factorise the above equation.

=5(2a + b)2 - (2a + b) - 4

= 5(2a + b)2 - 5(2a + b) + 4(2a + b) - 4

= 5(2a + b) [(2a + b) - 1] + 4 [(2a + b) - 1]

= [5(2a + b) + 4] [(2a + b) - 1]

= (10a + 5b + 4) (2a + b - 1) Answer 

Answered by | 15 Oct, 2012, 07:36: PM
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