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a. If B is opposite to each other, then C and D are negative reciprocal to each other, and M is an integer with absolute value of 2, find (a + b) · m + m * M-Cd Given that the sum of the opposite number of 2x-5 and 9-4X is 8, find the value of X X ＞ 0, y ＜ 0, the absolute value of X ＞ the absolute value of Y, try to compare the size of X, y, - x, - Y Answer today! 1111
1、a+b=0,cd=-1,m*m=4
So, (a + b) · m + m * M-Cd = 0 + 4 + 1 = 5;
2、-（2x-5）+9-4x=8,-2x+5+9-4x=8,-6x=-6,x=1.
3. Because x ＞ 0, y ＜ 0 | x | x ＞ y | x, so, - x ＜ y ＜ - y ＜ X
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