Whakaoti mō k
k=-3
Tohaina
Kua tāruatia ki te papatopenga
k=-\frac{1}{5}\times 15
Me whakarea ngā taha e rua ki te 15.
k=\frac{-15}{5}
Tuhia te -\frac{1}{5}\times 15 hei hautanga kotahi.
k=-3
Whakawehea te -15 ki te 5, kia riro ko -3.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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Whakarerekētanga
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