Datrys x_1^2-2-(x-0.8)=-2(0.9+x)

$$x _ { 1 } ^ { 2 } - 2 - ( x - 0.8 ) = - 2 ( 0.9 + x )$$

Datrys ar gyfer x

$$x=-\left(x_{1}^{2}+0.6\right)$$

Camau Ateb

I ddod o hyd i wrthwyneb x-0.8, dewch o hyd i wrthwyneb pob term.

$$x_{1}^{2}-2-x+0.8=-2\left(0.9+x\right)$$

Adio -2 a 0.8 i gael -1.2.

$$x_{1}^{2}-1.2-x=-2\left(0.9+x\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -2 â 0.9+x.

$$x_{1}^{2}-1.2-x=-1.8-2x$$

Ychwanegu 2x at y ddwy ochr.

$$x_{1}^{2}-1.2-x+2x=-1.8$$

Cyfuno -x a 2x i gael x.

$$x_{1}^{2}-1.2+x=-1.8$$

Tynnu x_{1}^{2} o'r ddwy ochr.

$$-1.2+x=-1.8-x_{1}^{2}$$

Ychwanegu 1.2 at y ddwy ochr.

$$x=-1.8-x_{1}^{2}+1.2$$

Adio -1.8 a 1.2 i gael -0.6.

$$x=-0.6-x_{1}^{2}$$

Datrys ar gyfer x_1 (complex solution)

$$x_{1}=-i\sqrt{x+0.6}$$

$$x_{1}=i\sqrt{x+0.6}$$

Datrys ar gyfer x_1

$$x_{1}=\frac{\sqrt{-4x-2.4}}{2}$$

$$x_{1}=-\frac{\sqrt{-4x-2.4}}{2}\text{, }x\leq -\frac{3}{5}$$