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2009-11-07T12:06:52+01:00
2009-11-07T12:08:57+01:00
A)(3x+2)^2 - (5x+1)^2= (3x+2)(3x+2)-(5x+1)(5x+1)=9x²+6x+6x+4-25x²-5x-5x-1
2009-11-07T13:52:45+01:00
A)(3x+2)^2 - (5x+1)^2= (3x+2)(3x+2)-(5x+1)(5x+1)=9x²+6x+6x+4-25x²-5x-5x-1

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