Odpowiedzi

2010-03-03T07:22:44+01:00
6(x-4)-2=6x-24-2=6x-26
2(x+1)-3(x-1)=2x+2-3x+3
-3(y-2)+4(y+2)=-3y+6+4y+8=y+14
5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13
2(3a+b)-2(a-b)=6a+2b-2a+2b=4a+4b
5a(a-3)-3a(a-5)=5a²-15a-3a²+15a=2a²
1 3 1
2010-03-03T07:23:24+01:00
A) 6(x-4)-2=6x-24-2=6x-26
b) 2(x+1)-3(x-1)=2x+2-3x+3= -x+5
c) -3(y-2)+4(y+2)=-3y+6+4y+8=y+14
d) 5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13
e) 2(3a+b)-2(a-b)=6a+2b-2a+2b=4a+4b
f) 5a(a-3)-3a(a-5)=5a²-15a-3a²+15a=2a²