Solve 449=x^2

$$449 = x ^ { 2 }$$

Solve for x

$$x=\sqrt{449}\approx 21.1896201$$

$$x=-\sqrt{449}\approx -21.1896201$$

Steps by Finding Square Root

Swap sides so that all variable terms are on the left hand side.

$$x^{2}=449$$

Take the square root of both sides of the equation.

$$x=\sqrt{449} x=-\sqrt{449}$$

Steps Using the Quadratic Formula

Swap sides so that all variable terms are on the left hand side.

$$x^{2}=449$$

Subtract 449 from both sides.

$$x^{2}-449=0$$

This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and -449 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$x=\frac{0±\sqrt{0^{2}-4\left(-449\right)}}{2}$$

Square 0.

$$x=\frac{0±\sqrt{-4\left(-449\right)}}{2}$$

Multiply -4 times -449.

$$x=\frac{0±\sqrt{1796}}{2}$$

Take the square root of 1796.

$$x=\frac{0±2\sqrt{449}}{2}$$

Now solve the equation x=\frac{0±2\sqrt{449}}{2} when ± is plus.

$$x=\sqrt{449}$$

Now solve the equation x=\frac{0±2\sqrt{449}}{2} when ± is minus.

$$x=-\sqrt{449}$$

The equation is now solved.

$$x=\sqrt{449} x=-\sqrt{449}$$