Whakaoti mō r
r=-6
Tohaina
Kua tāruatia ki te papatopenga
-10r=80-20
Tangohia te 20 mai i ngā taha e rua.
-10r=60
Tangohia te 20 i te 80, ka 60.
r=\frac{60}{-10}
Whakawehea ngā taha e rua ki te -10.
r=-6
Whakawehea te 60 ki te -10, kia riro ko -6.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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