Zapisz w jak najprostrzej postaci:
a) (a+b)-(2a-b)-(a-2b)=
b) (3x-y+1)-(x+y)+(y-x)=
c) - (kx+ny)-(3kx+2ny)+(5kx-3ny)=
d) (2ab+a+3)-(3ab-a+3)=
e) (4x2-3x)-(x+0,1x2)-(x2-0,1x)=
prosze o szybką opd:)
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a) a+b - 2a+b - a+2b = -2a + 4b = 2(2b-a)
b) 3x-y+1 -x-y +y-x = x-y+1
c) -kx-ny-3kx-2ny+5kx-3ny = kx-6ny
d) 2ab+a+3 - 3ab+a-3 = -ab+2a = a(2-b)
e) 4x^2-3x - x-0,1x^2 - x^2+0,1x = 2,9x^2-3,9x = x(2,9x-3,9)