Whakaoti i te 6x^2-13x-63<0

$$6 x ^ { 2 } - 13 x - 63 < 0$$

Whakaoti mō x

$$x\in \left(-\frac{7}{3},\frac{9}{2}\right)$$

Ngā Upane e Whakamahi ana i te Tikanga Tātai Pūrua

Kia whakaotia te koreōrite, me tauwehe te taha mauī. Ka taea te huamaha pūrua te tauwehe mā te whakamahi i te huringa ax^{2}+bx+c=a\left(x-x_{1}\right)\left(x-x_{2}\right), ina ko x_{1} me x_{2} ngā otinga o te whārite pūrua ax^{2}+bx+c=0.

$$6x^{2}-13x-63=0$$

Ka taea ngā whārite katoa o te momo ax^{2}+bx+c=0 te whakaoti mā te ture pūrua: \frac{-b±\sqrt{b^{2}-4ac}}{2a}. Whakakapia te 6 mō te a, te -13 mō te b, me te -63 mō te c i te ture pūrua.

$$x=\frac{-\left(-13\right)±\sqrt{\left(-13\right)^{2}-4\times 6\left(-63\right)}}{2\times 6}$$

Mahia ngā tātaitai.

$$x=\frac{13±41}{12}$$

Whakaotia te whārite x=\frac{13±41}{12} ina he tōrunga te ±, ina he tōraro te ±.

$$x=\frac{9}{2} x=-\frac{7}{3}$$

Tuhia anō te koreōrite mā te whakamahi i ngā otinga i whiwhi.

$$6\left(x-\frac{9}{2}\right)\left(x+\frac{7}{3}\right)<0$$

Kia tōraro te otinga, me tauaro rawa ngā tohu o te x-\frac{9}{2} me te x+\frac{7}{3}. Whakaarohia te tauira ina he tōrunga te x-\frac{9}{2} he tōraro te x+\frac{7}{3}.

$$x-\frac{9}{2}>0 x+\frac{7}{3}<0$$

He teka tēnei mō tētahi x ahakoa.

$$x\in \emptyset$$

Whakaarohia te tauira ina he tōrunga te x+\frac{7}{3} he tōraro te x-\frac{9}{2}.

$$x+\frac{7}{3}>0 x-\frac{9}{2}<0$$

Te otinga e whakaea i ngā koreōrite e rua ko x\in \left(-\frac{7}{3},\frac{9}{2}\right).

$$x\in \left(-\frac{7}{3},\frac{9}{2}\right)$$

Ko te otinga whakamutunga ko te whakakotahi i ngā otinga kua whiwhi.

$$x\in \left(-\frac{7}{3},\frac{9}{2}\right)$$