Odpowiedzi

2011-08-20T09:44:17+02:00

a) 3(a+b)+(a-2b)=3a+3b+a-2b=4a+b
b) -4(x-z)-(x+y)=-4x+4z-x-y=-5x+4z-y
c) 5(4x-7)+(7-4x)=20x-35+7-4x=16x-28
d) (4x-y)-2(x+y)=4x-y-2x-2y=2x-3y
e) 2(3x-2y+3z)-5(x-y-z)=6x-4y+6z-5x+5y+5z=x+y+11z
f) 4x(x-y-z)-2x(4x-y+z)=4x²-4xy-4xz-8x²+2xy-2xz=-4x²-6xz-2xy

g) -3x²(x-⅔y)+5x(x²-7xy)=-3x³+2x²y+5x³-35x²y=2x³-33x²y
h) -2√2(a+√2b)-4(a√2-2b)=-2√2a-4b-4√2a+8b=-6√2a+4b

 

 

liczę na naj ;D