\left\{ \begin{array} { c } { x + y + z = 0 } \\ { 2 x - 5 y - 3 z = 10 } \\ { 4 x + 8 y + 2 z = 4 } \end{array} \right.
Whakaoti mō x, y, z
x=2
y=0
z=-2
Tohaina
Kua tāruatia ki te papatopenga
x=-y-z
Me whakaoti te x+y+z=0 mō x.
2\left(-y-z\right)-5y-3z=10 4\left(-y-z\right)+8y+2z=4
Whakakapia te -y-z mō te x i te whārite tuarua me te tuatoru.
y=-\frac{10}{7}-\frac{5}{7}z z=-2+2y
Me whakaoti ēnei whārite mō y me z takitahi.
z=-2+2\left(-\frac{10}{7}-\frac{5}{7}z\right)
Whakakapia te -\frac{10}{7}-\frac{5}{7}z mō te y i te whārite z=-2+2y.
z=-2
Me whakaoti te z=-2+2\left(-\frac{10}{7}-\frac{5}{7}z\right) mō z.
y=-\frac{10}{7}-\frac{5}{7}\left(-2\right)
Whakakapia te -2 mō te z i te whārite y=-\frac{10}{7}-\frac{5}{7}z.
y=0
Tātaitia te y i te y=-\frac{10}{7}-\frac{5}{7}\left(-2\right).
x=-0-\left(-2\right)
Whakakapia te 0 mō te y me te -2 mō z i te whārite x=-y-z.
x=2
Tātaitia te x i te x=-0-\left(-2\right).
x=2 y=0 z=-2
Kua oti te pūnaha te whakatau.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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