Datrys 5(x+15)^2-7=0

$$5 ( x + 15 ) ^ { 2 } - 7 = 0$$

Datrys ar gyfer x

$$x=\frac{\sqrt{35}}{5}-15\approx -13.816784043$$

$$x=-\frac{\sqrt{35}}{5}-15\approx -16.183215957$$

Camau drwy Ganfod Isradd

Adio 7 at ddwy ochr yr hafaliad.

$$5\left(x+15\right)^{2}-7+7=7$$

Mae tynnu 7 o’i hun yn gadael 0.

$$5\left(x+15\right)^{2}=7$$

Rhannu’r ddwy ochr â 5.

$$\frac{5\left(x+15\right)^{2}}{5}=\frac{7}{5}$$

Mae rhannu â 5 yn dad-wneud lluosi â 5.

$$\left(x+15\right)^{2}=\frac{7}{5}$$

Cymryd isradd dwy ochr yr hafaliad.

$$x+15=\frac{\sqrt{35}}{5} x+15=-\frac{\sqrt{35}}{5}$$

Tynnu 15 o ddwy ochr yr hafaliad.

$$x+15-15=\frac{\sqrt{35}}{5}-15 x+15-15=-\frac{\sqrt{35}}{5}-15$$

Mae tynnu 15 o’i hun yn gadael 0.

$$x=\frac{\sqrt{35}}{5}-15 x=-\frac{\sqrt{35}}{5}-15$$