Whakaoti mō Δ
\Delta =1400
Tautapa Δ
\Delta ≔1400
Tohaina
Kua tāruatia ki te papatopenga
\Delta =900-4\left(-5\right)\times 25
Tātaihia te 30 mā te pū o 2, kia riro ko 900.
\Delta =900-\left(-20\times 25\right)
Whakareatia te 4 ki te -5, ka -20.
\Delta =900-\left(-500\right)
Whakareatia te -20 ki te 25, ka -500.
\Delta =900+500
Ko te tauaro o -500 ko 500.
\Delta =1400
Tāpirihia te 900 ki te 500, ka 1400.
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