Whakaoti mō x_1
x_{1}=-1
Tohaina
Kua tāruatia ki te papatopenga
0=-x_{1}-1
Me whakarea ngā taha e rua ki te 2. Ko te tau i whakarea ki te kore ka hua ko te kore.
-x_{1}-1=0
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
-x_{1}=1
Me tāpiri te 1 ki ngā taha e rua. Ko te tau i tāpiria he kore ka hua koia tonu.
x_{1}=-1
Me whakarea ngā taha e rua ki te -1.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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Poukapa
\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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