Solve x^2=63

$${ x }^{ 2 } =63$$

Solve for x

$$x=3\sqrt{7}\approx 7.937253933$$

$$x=-3\sqrt{7}\approx -7.937253933$$

Steps by Finding Square Root

Take the square root of both sides of the equation.

$$x=3\sqrt{7} x=-3\sqrt{7}$$

Steps Using the Quadratic Formula

Subtract 63 from both sides.

$$x^{2}-63=0$$

This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and -63 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$x=\frac{0±\sqrt{0^{2}-4\left(-63\right)}}{2}$$

Square 0.

$$x=\frac{0±\sqrt{-4\left(-63\right)}}{2}$$

Multiply -4 times -63.

$$x=\frac{0±\sqrt{252}}{2}$$

Take the square root of 252.

$$x=\frac{0±6\sqrt{7}}{2}$$

Now solve the equation x=\frac{0±6\sqrt{7}}{2} when ± is plus.

$$x=3\sqrt{7}$$

Now solve the equation x=\frac{0±6\sqrt{7}}{2} when ± is minus.

$$x=-3\sqrt{7}$$

The equation is now solved.

$$x=3\sqrt{7} x=-3\sqrt{7}$$