Whakaoti mō x
x=\frac{5}{16}=0.3125
Graph
Tohaina
Kua tāruatia ki te papatopenga
4x+5=20x
Tē taea kia ōrite te tāupe x ki 0 nā te kore tautuhi i te whakawehenga mā te kore. Whakareatia ngā taha e rua o te whārite ki te 4x.
4x+5-20x=0
Tangohia te 20x mai i ngā taha e rua.
-16x+5=0
Pahekotia te 4x me -20x, ka -16x.
-16x=-5
Tangohia te 5 mai i ngā taha e rua. Ko te tau i tango i te kore ka hua ko tōna korenga.
x=\frac{-5}{-16}
Whakawehea ngā taha e rua ki te -16.
x=\frac{5}{16}
Ka taea te hautanga \frac{-5}{-16} te whakamāmā ki te \frac{5}{16} mā te tango tahi i te tohu tōraro i te taurunga me te tauraro.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
Āhuahanga
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