Réitigh P(x)+P(x-1)=2x^2-4x+2

$$P ( x ) + P ( x - 1 ) = 2 x ^ { 2 } - 4 x + 2$$

Réitigh do P.

$$P=\frac{2\left(x-1\right)^{2}}{2x-1}$$

$$x\neq \frac{1}{2}$$

Céimeanna chun Cothromóidí Líneacha a Réiteach

Úsáid an t-airí dáileach chun P a mhéadú faoi x-1.

$$Px+Px-P=2x^{2}-4x+2$$

Comhcheangail Px agus Px chun 2Px a fháil.

$$2Px-P=2x^{2}-4x+2$$

Comhcheangail na téarmaí ar fad ina bhfuil P.

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

Roinn an dá thaobh faoi 2x-1.

$$\frac{\left(2x-1\right)P}{2x-1}=\frac{2\left(x-1\right)^{2}}{2x-1}$$

Má roinntear é faoi 2x-1 cuirtear an iolrúchán faoi 2x-1 ar ceal.

$$P=\frac{2\left(x-1\right)^{2}}{2x-1}$$

Réitigh do x. (complex solution)

$$x=\frac{-\sqrt{P\left(P+2\right)}+P+2}{2}$$

$$x=\frac{\sqrt{P\left(P+2\right)}+P+2}{2}$$

Réitigh do x.

$$x=\frac{-\sqrt{P\left(P+2\right)}+P+2}{2}$$

$$x=\frac{\sqrt{P\left(P+2\right)}+P+2}{2}\text{, }P\leq -2\text{ or }P\geq 0$$