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akash_809
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\[20n^2+37n+15 = 20 N^2 +25n +12n+15=5n(4n+5) +3 (4n+5)\] can u solve now

akash_809
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(@Stephen2012 do u et it

Stephen2012
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I foil it now right?

akash_809
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it becomes (5n+3) (4n+5) ask me if u hv any doubt

Stephen2012
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Where did you get the 3 & 4?

akash_809
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tooks 5n common and 3 as common

Stephen2012
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Oh,OK.Thanks

Stephen2012
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8r^213r+5

Stephen2012
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(4r+?)(2r?)right