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m in (-oo:+oo)
m^2+7*m-(51/4) = 0
m^2+7*m-51/4 = 0
m^2+7*m-51/4 = 0
DELTA = 7^2-(-51/4*1*4)
DELTA = 100
DELTA > 0
m = (100^(1/2)-7)/(1*2) or m = (-100^(1/2)-7)/(1*2)
m = 3/2 or m = -17/2
m in { -17/2, 3/2 }
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