Whakaoti mō x
x=-1
Graph
Tohaina
Kua tāruatia ki te papatopenga
2.5-3.5x=8-\left(4x+6\right)
Whakamahia te āhuatanga tohatoha hei whakarea te 0.5 ki te 5-7x.
2.5-3.5x=8-4x-6
Hei kimi i te tauaro o 4x+6, kimihia te tauaro o ia taurangi.
2.5-3.5x=2-4x
Tangohia te 6 i te 8, ka 2.
2.5-3.5x+4x=2
Me tāpiri te 4x ki ngā taha e rua.
2.5+0.5x=2
Pahekotia te -3.5x me 4x, ka 0.5x.
0.5x=2-2.5
Tangohia te 2.5 mai i ngā taha e rua.
0.5x=-0.5
Tangohia te 2.5 i te 2, ka -0.5.
x=\frac{-0.5}{0.5}
Whakawehea ngā taha e rua ki te 0.5.
x=-1
Whakawehea te -0.5 ki te 0.5, kia riro ko -1.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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