Datrys (x-7)^2=7

$$( x - 7 ) ^ { 2 } = 7$$

Datrys ar gyfer x

$$x=\sqrt{7}+7\approx 9.645751311$$

$$x=7-\sqrt{7}\approx 4.354248689$$

Camau drwy Ganfod Isradd

Cymryd isradd dwy ochr yr hafaliad.

$$x-7=\sqrt{7} x-7=-\sqrt{7}$$

Adio 7 at ddwy ochr yr hafaliad.

$$x-7-\left(-7\right)=\sqrt{7}-\left(-7\right) x-7-\left(-7\right)=-\sqrt{7}-\left(-7\right)$$

Mae tynnu -7 o’i hun yn gadael 0.

$$x=\sqrt{7}-\left(-7\right) x=-\sqrt{7}-\left(-7\right)$$

Tynnu -7 o \sqrt{7}.

$$x=\sqrt{7}+7$$

Tynnu -7 o -\sqrt{7}.

$$x=7-\sqrt{7}$$

Mae’r hafaliad wedi’i ddatrys nawr.

$$x=\sqrt{7}+7 x=7-\sqrt{7}$$