Whakaoti mō x_4
x_{4} = -\frac{5}{2} = -2\frac{1}{2} = -2.5
Tohaina
Kua tāruatia ki te papatopenga
2x_{4}=-5
Tangohia te 5 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x_{4}=\frac{-5}{2}
Whakawehea ngā taha e rua ki te 2.
x_{4}=-\frac{5}{2}
Ka taea te hautanga \frac{-5}{2} te tuhi anō ko -\frac{5}{2} mā te tango i te tohu tōraro.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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