Odpowiedzi

2010-02-16T18:17:47+01:00
A+(a-b)=a+a-b=2a-b
2x-(x+4)=2x-x-4=x-4
7-(-x+6)=7+x-6=1+x
-(x+4)+9x-5)=-x-4+9x-5=8x-9
1-(t+p)-(t-2)=1-t-p-t+2=3-2t-p
-(-y+2)+(-2y-4)= y-2-2y-4=-y-6
2010-02-16T18:21:33+01:00
A+ (a-b)= a+a-b = 2a +b
2x -(x+4)= 2x -x- 4= x-4
7-(-x+6) = 7+x -6= x+1
-(x+4) +9x-5- -x-4+9x-5= 8x-9
1-(t+p)-(t-2)= 1-t-p-t+2= 3-2t-p
-(-y+2)+(-2y-4)= y-2-2y-4= -y-6