Whakaoti mō r
r=42
Tohaina
Kua tāruatia ki te papatopenga
2r=12\times 7
Me whakarea ngā taha e rua ki te 7.
2r=84
Whakareatia te 12 ki te 7, ka 84.
r=\frac{84}{2}
Whakawehea ngā taha e rua ki te 2.
r=42
Whakawehea te 84 ki te 2, kia riro ko 42.
Ngā Tauira
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{ x } ^ { 2 } - 4 x - 5 = 0
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