Odpowiedzi

2010-02-23T21:49:30+01:00
A) 8a-4+2a-5+3a-1=10a-10=10*(-5)-10=-50-10=-60
)8x-4y+14x+6y+12x+12y=34x+14y=34*(-0,5)+14*0,5=-17+7=-10
1 1 1
2010-02-23T21:49:54+01:00
A) -4(-2a+1)-(-2a+5)+(3a-1)= 8a-4+2a-5+3a-1=10a-10=10*(-5) -10= -50-10= -60

b). 4(2x-y)+2(7x+3y)-12(-x-y)= 8x-4y+14x+6y+12x+12y=34x+14y= 34*(-0,5) + 14*0,5= -17 + 7 = -10
1 1 1
2010-02-23T21:52:44+01:00
A 8a-4-2a-5+3a-1
8a-2a+3a-4-1
9a-5
9*(-5)-5
-45-5=-50

b 6x-4y+14x+6y-12x+12y
8x+14y
8*0,5+14*0,5=4+7=11
1 5 1