Odpowiedzi

2010-02-13T16:18:47+01:00
A)2a+3b-c-4a-3b+2c= c - 2a
b)xy+3x-y+1-2xy-2x+y+1=2-xy+x
c)x2+2xy-3y2-2x2-y2-x2+2xy= 4xy-2x-8y
2010-02-13T16:23:14+01:00
A) 6a+6b+3c
b) x+2
c) -4x+4xy-8y
2010-02-13T18:11:05+01:00
A)2a+3b-c-4a-3b+2c= -2a+c
b)xy+3x-y+1-2xy-2x+y+1= -xy+x+2
c)x2+2xy-3y2-2x2-y2-x2+2xy= -2x²+4xy-4y²