Whakaoti mō d
d=4
Tohaina
Kua tāruatia ki te papatopenga
d=-\frac{1}{5}\left(-20\right)
Me whakarea ngā taha e rua ki te -20.
d=\frac{-\left(-20\right)}{5}
Tuhia te -\frac{1}{5}\left(-20\right) hei hautanga kotahi.
d=\frac{20}{5}
Whakareatia te -1 ki te -20, ka 20.
d=4
Whakawehea te 20 ki te 5, kia riro ko 4.
Ngā Tauira
whārite tapawhā
{ x } ^ { 2 } - 4 x - 5 = 0
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