Rozwiązac z obliczeniami wszystko na dzis
zad.6.Wykonaj działania;
a). (a +b)-(2a -b)-(a-b)
b) (3x-y+1)-(x+y)+2(x+y)
c) -(kx+ny)-2(3kx+2ny)+5(kx-ny)
d) (2ab+a+b)-(3ab-a+b)
e) (4x²-3x)-(x+0,1x²)-(x²-0,1x)
f) 4x(x-1)-2(2x²-1)
g) 5a(a²-3a)-3a(a²-5a)
h) (5x-1)-(3x+2)-[(1-(1-x)-(-x)]
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a). (a +b)-(2a -b)-(a-b)=a+b-2a+b-a+b=-2a+3b
b) (3x-y+1)-(x+y)+2(x+y)=3x-y+1-x-y+2x+2y=4x+1
c) -(kx+ny)-2(3kx+2ny)+5(kx-ny)=-kx-ny-6kx-4ny+5kx-5ny=-2kx
d) (2ab+a+b)-(3ab-a+b)=2ab+a+b-3ab+a-b=2a-ab
e) (4x²-3x)-(x+0,1x²)-(x²-0,1x)=4x²-3x-x-0,1x²-x²+0,1x=2,9x²-3,9x
f) 4x(x-1)-2(2x²-1)=4x²-4-4x²+2=-2
g) 5a(a²-3a)-3a(a²-5a)=5a³-15a²-3a³+15a²=2a³
h) (5x-1)-(3x+2)-[(1-(1-x)-(-x)]=5x-1-3x-2-[1-1+x+x]=5x-1-3x-2-1+1-x-x=-3