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m in (-oo:+oo)
8 = (1/2)*(-m-1) // - (1/2)*(-m-1)
8-((1/2)*(-m-1)) = 0
(-1/2)*(-m-1)+8 = 0
8-1/2*(-m-1) = 0
8-1/2*(-m-1) = 0
1/2*m+17/2 = 0
1/2*m+17/2 = 0
1/2*m+17/2 = 0 // - 17/2
1/2*m = -17/2 // : 1/2
m = -17/2/1/2
m = -17
m = -17
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