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m in (-oo:+oo)
4*m+1/2 = 3*m-(5/2) // - 3*m-(5/2)
4*m-(3*m)+1/2+5/2 = 0
4*m-3*m+1/2+5/2 = 0
m+3 = 0 // - 3
m = -3
m = -3
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