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2014-09-03T12:56:06-03:00
(x-1).(x-1) = x²-1x-1x+1 = x²-2x+1

(x+3).(x+3)= x²+3x+3x+9=x²+6x+9

(x-1/2).(x-1/2)= x²-1/2x-1/2x+1/4 = x²-2/4x+1/4

 (x+v5).(x+v5)= x²+ v5x+v5x+v10 = x²+v10x+v10
4 4 4