Réitigh left(k-2right)x^2-x-4k=0

$$\left( k-2 \right) { x }^{ 2 } -x-4k=0$$

Réitigh do k. (complex solution)

$$k=\frac{x\left(2x+1\right)}{x^{2}-4}$$

$$x\neq -2\text{ and }x\neq 2$$

Céimeanna chun Cothromóidí Líneacha a Réiteach

Úsáid an t-airí dáileach chun k-2 a mhéadú faoi x^{2}.

$$kx^{2}-2x^{2}-x-4k=0$$

Cuir 2x^{2} leis an dá thaobh. Is ionann rud ar bith móide nialas agus a shuim féin.

$$kx^{2}-x-4k=2x^{2}$$

Cuir x leis an dá thaobh.

$$kx^{2}-4k=2x^{2}+x$$

Comhcheangail na téarmaí ar fad ina bhfuil k.

$$\left(x^{2}-4\right)k=2x^{2}+x$$

Roinn an dá thaobh faoi x^{2}-4.

$$\frac{\left(x^{2}-4\right)k}{x^{2}-4}=\frac{x\left(2x+1\right)}{x^{2}-4}$$

Má roinntear é faoi x^{2}-4 cuirtear an iolrúchán faoi x^{2}-4 ar ceal.

$$k=\frac{x\left(2x+1\right)}{x^{2}-4}$$

Réitigh do k.

$$k=\frac{x\left(2x+1\right)}{x^{2}-4}$$

$$|x|\neq 2$$

Céimeanna chun Cothromóidí Líneacha a Réiteach

Úsáid an t-airí dáileach chun k-2 a mhéadú faoi x^{2}.

$$kx^{2}-2x^{2}-x-4k=0$$

Cuir 2x^{2} leis an dá thaobh. Is ionann rud ar bith móide nialas agus a shuim féin.

$$kx^{2}-x-4k=2x^{2}$$

Cuir x leis an dá thaobh.

$$kx^{2}-4k=2x^{2}+x$$

Comhcheangail na téarmaí ar fad ina bhfuil k.

$$\left(x^{2}-4\right)k=2x^{2}+x$$

Roinn an dá thaobh faoi x^{2}-4.

$$\frac{\left(x^{2}-4\right)k}{x^{2}-4}=\frac{x\left(2x+1\right)}{x^{2}-4}$$

Má roinntear é faoi x^{2}-4 cuirtear an iolrúchán faoi x^{2}-4 ar ceal.

$$k=\frac{x\left(2x+1\right)}{x^{2}-4}$$

Réitigh do x. (complex solution)

$$\left\{\begin{matrix}x=\frac{\sqrt{16k^{2}-32k+1}+1}{2\left(k-2\right)}\text{; }x=\frac{-\sqrt{16k^{2}-32k+1}+1}{2\left(k-2\right)}\text{, }&k\neq 2\\x=-8\text{, }&k=2\end{matrix}\right.$$

Réitigh do x.

$$\left\{\begin{matrix}x=\frac{\sqrt{16k^{2}-32k+1}+1}{2\left(k-2\right)}\text{; }x=\frac{-\sqrt{16k^{2}-32k+1}+1}{2\left(k-2\right)}\text{, }&k\leq -\frac{\sqrt{15}}{4}+1\text{ or }\left(k\neq 2\text{ and }k\geq \frac{\sqrt{15}}{4}+1\right)\\x=-8\text{, }&k=2\end{matrix}\right.$$