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nguyenbahiep1

[laTEX]\Delta' = m^2 +m \\ \\ TH_1: m^2+m < 0 \Rightarrow -1< m < 0 \Rightarrow bpt-vo-nghiem \\ \\ TH_2: m^2+m =0 \Rightarrow m = 0 , m = - 1 \\ \\ \Rightarrow bpt - co-nghiem: x = 0 , x = -1 \\ \\ TH_3: m^2+m > 0 \Rightarrow m > 0 , m < -1 \\ \\ \Rightarrow bpt -co-nghiem: x \in [x_1 ,x_2] \\ \\ x_2 = m +\sqrt{m^2+m} \\ \\ x_1 = m- \sqrt{m^2+m}[/laTEX]
 
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