Whakaoti mō x
x=-1
Graph
Tohaina
Kua tāruatia ki te papatopenga
18-6x+4\left(5x-1\right)=0
Whakamahia te āhuatanga tohatoha hei whakarea te 3 ki te 6-2x.
18-6x+20x-4=0
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te 5x-1.
18+14x-4=0
Pahekotia te -6x me 20x, ka 14x.
14+14x=0
Tangohia te 4 i te 18, ka 14.
14x=-14
Tangohia te 14 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-14}{14}
Whakawehea ngā taha e rua ki te 14.
x=-1
Whakawehea te -14 ki te 14, kia riro ko -1.
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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