Whakaoti i te (-9/2)^2+9(-9/2)+18

$$( - \frac { 9 } { 2 } ) ^ { 2 } + 9 ( - \frac { 9 } { 2 } ) + 18$$

Aromātai

$$-\frac{9}{4}=-2.25$$

Ngā Upane Otinga

Tātaihia te -\frac{9}{2} mā te pū o 2, kia riro ko \frac{81}{4}.

$$\frac{81}{4}+9\left(-\frac{9}{2}\right)+18$$

Tuhia te 9\left(-\frac{9}{2}\right) hei hautanga kotahi.

$$\frac{81}{4}+\frac{9\left(-9\right)}{2}+18$$

Whakareatia te 9 ki te -9, ka -81.

$$\frac{81}{4}+\frac{-81}{2}+18$$

Ka taea te hautanga \frac{-81}{2} te tuhi anō ko -\frac{81}{2} mā te tango i te tohu tōraro.

$$\frac{81}{4}-\frac{81}{2}+18$$

Ko te maha noa iti rawa atu o 4 me 2 ko 4. Me tahuri \frac{81}{4} me \frac{81}{2} ki te hautau me te tautūnga 4.

$$\frac{81}{4}-\frac{162}{4}+18$$

Tā te mea he rite te tauraro o \frac{81}{4} me \frac{162}{4}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{81-162}{4}+18$$

Tangohia te 162 i te 81, ka -81.

$$-\frac{81}{4}+18$$

Me tahuri te 18 ki te hautau \frac{72}{4}.

$$-\frac{81}{4}+\frac{72}{4}$$

Tā te mea he rite te tauraro o -\frac{81}{4} me \frac{72}{4}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-81+72}{4}$$

Tāpirihia te -81 ki te 72, ka -9.

$$-\frac{9}{4}$$

Tauwehe

$$-\frac{9}{4} = -2\frac{1}{4} = -2.25$$