[size=200]Is -(x-y) = -x+y ?[br][br]Answer the following :[br](a) If x and y are substituted with different values as shown above and the expression on the left of "=" and expression on the right are evaluated, do they have the same result?[br][br](b) If yes, can we say that -(x-y) = -x+y ?[/size]
[size=200](a) Yes[br](b) Yes, since the expressions on the left and right of "=" produce the same results always for any given x and y substituted.[br][/size]