Răspunsuri

2014-03-16T10:26:23+02:00
X2= x la a 2 a 
( x+1 )  = x2+ 2x+1
( 1+x) = 1+ 2x+x2
(-x-1) = -x2- (-2x) + 1
(x-1)= x2-2x+1
( 3-x) = 9- 9x+ x2
(x-3)= x2-9x+9