Odpowiedzi

2010-02-28T17:55:36+01:00
B) (a+3)-(3a-b+1) = a + 3 - 3a +b - 1 = - 2a + b + 2
c) (-2)razy(x+2y-4) = -2x - 4y +8
d) 2 razy(x+3y)-4 razy(x-2)+(y-3) = 2x + 6y - 4x + 8 + y - 3 = -2x +7y + 5
2010-02-28T17:56:09+01:00
(a+3)-(3a-b+1)=a+3-3a+b-1=-2a+b+2
(-2)*(x+2y-4)=-2x-4y+8
2*(x+3y)-4*(x-2)+(y-3)=2x+6y-4x+8+y-3=-2x+7y+5
2010-02-28T17:56:38+01:00
A)a+b-3a+b-1=2a+b+2
b)-2x-4y+8
c)2x+6y-4x+8+y-3=2x+7y-5