Whakaoti i te M(65)=-1/28(65)^2+3(65)-31

$$M ( 65 ) = - \frac { 1 } { 28 } ( 65 ) ^ { 2 } + 3 ( 65 ) - 31$$

Aromātai

$$\frac{367}{28}\approx 13.107142857$$

Ngā Upane Otinga

Tātaihia te 65 mā te pū o 2, kia riro ko 4225.

$$-\frac{1}{28}\times 4225+3\times 65-31$$

Tuhia te -\frac{1}{28}\times 4225 hei hautanga kotahi.

$$\frac{-4225}{28}+3\times 65-31$$

Ka taea te hautanga \frac{-4225}{28} te tuhi anō ko -\frac{4225}{28} mā te tango i te tohu tōraro.

$$-\frac{4225}{28}+3\times 65-31$$

Whakareatia te 3 ki te 65, ka 195.

$$-\frac{4225}{28}+195-31$$

Me tahuri te 195 ki te hautau \frac{5460}{28}.

$$-\frac{4225}{28}+\frac{5460}{28}-31$$

Tā te mea he rite te tauraro o -\frac{4225}{28} me \frac{5460}{28}, me tāpiri rāua mā te tāpiri i ō raua taurunga.

$$\frac{-4225+5460}{28}-31$$

Tāpirihia te -4225 ki te 5460, ka 1235.

$$\frac{1235}{28}-31$$

Me tahuri te 31 ki te hautau \frac{868}{28}.

$$\frac{1235}{28}-\frac{868}{28}$$

Tā te mea he rite te tauraro o \frac{1235}{28} me \frac{868}{28}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{1235-868}{28}$$

Tangohia te 868 i te 1235, ka 367.

$$\frac{367}{28}$$

Tauwehe

$$\frac{367}{2 ^ {2} \cdot 7} = 13\frac{3}{28} = 13.107142857142858$$