Odpowiedzi

2010-01-08T20:32:34+01:00
A) -4(x-z)-(x+y)=-4x+4z-x-y=-5x+4z-y
b) 5(4x-7)+(7-4x)=20x-35+7-4x=16x-28
c) (4x-y)-2(x+y)=4x-y-2x-2y=2x-3y
d) 2(3x-2y-3z)-5(x-y+z)=6x-4y-6z-5x+5y-5z=x+y-11z
e) 4x(x-y-z)-2x(4x-y+z)=4x²-4xy-4xz-8x²+2xy-2xz=-4x²-2xy-6xz
f) -3x²(x-2/3y)+5x(x²-7xy)=-3x³+6x²y+5x³-35x²y=2x³-29x²y
g)-2√2 (a+√2b)-4(a√2-2b)=-2√2a-4b-4√2a+8b=-6√2a+4b