Odpowiedzi

Najlepsza Odpowiedź!
2010-01-29T20:51:14+01:00
A) (x-2) - (2-x) = x-2-2+x = 2x-4
b) (a+b) + (2a-b)- (a-2b) = a+b+2a-b-a+2b = 2a+2b
c) (3x-y+1) -(x+y) + (y-x) = 3x-y+1-x-y+y-x = x-y+1
d) -(2a-3ab)-(2b-3a)+ (-ab-b) = -2a+3ab-2b+3a-ab-b = a+2ab-3b
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A) (x-2) - (2-x) = x-2-2+x = 2x -4
b) (a+b) + (2a-b)- (a-2b)= a+b+2a-b-a+2b= 2a+2b
c) (3x-y+1) -(x+y) + (y-x)= 3x-y+1-x-y+y-x= x-2y+1
d) -(2a-3ab)-(2b-3a)+ (-ab-b)= -2a+3ab-2b+3a-ab-b= 2ab+a-3b
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