Solve x^2+80=1

$$x ^ { 2 } + 80 = 1$$

Solve for x (complex solution)

$$x=-\sqrt{79}i\approx -0-8.888194417i$$

$$x=\sqrt{79}i\approx 8.888194417i$$

Steps by Finding Square Root

Subtract 80 from both sides.

$$x^{2}=1-80$$

Subtract 80 from 1 to get -79.

$$x^{2}=-79$$

The equation is now solved.

$$x=\sqrt{79}i x=-\sqrt{79}i$$

Steps Using the Quadratic Formula

Subtract 1 from both sides.

$$x^{2}+80-1=0$$

Subtract 1 from 80 to get 79.

$$x^{2}+79=0$$

This equation is in standard form: ax^{2}+bx+c=0. Substitute 1 for a, 0 for b, and 79 for c in the quadratic formula, \frac{-b±\sqrt{b^{2}-4ac}}{2a}.

$$x=\frac{0±\sqrt{0^{2}-4\times 79}}{2}$$

Square 0.

$$x=\frac{0±\sqrt{-4\times 79}}{2}$$

Multiply -4 times 79.

$$x=\frac{0±\sqrt{-316}}{2}$$

Take the square root of -316.

$$x=\frac{0±2\sqrt{79}i}{2}$$

Now solve the equation x=\frac{0±2\sqrt{79}i}{2} when ± is plus.

$$x=\sqrt{79}i$$

Now solve the equation x=\frac{0±2\sqrt{79}i}{2} when ± is minus.

$$x=-\sqrt{79}i$$

The equation is now solved.

$$x=\sqrt{79}i x=-\sqrt{79}i$$