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Find the unknown.$$x^{2}+4=0$$

$$\pm 2 i$$

Algebra

Chapter 0

Reviewing the Basics

Section 2

Solving Equations of the Form $a x^{2}-b=0$

Equations and Inequalities

Missouri State University

Harvey Mudd College

Baylor University

University of Michigan - Ann Arbor

Lectures

01:43

Find the unknown.$$(x-…

00:32

Find the unknown.$$x^{…

00:44

Solve the equation.$$<…

01:07

Find the unknown.$$3 x…

02:36

Find the unknown.$$(6 …

01:06

00:49

Solve the equation.$$x…

01:39

\text { Solve } x^{2}-4 x+…

Solve the equation for $x$…

02:11

Solve the equation.$$2…

It's Clarisse of enumerated here. So here, we're going to solve for X. In the equation, X square plus four is equal to zero. So before we tackle this problem, we're going to take a look on the right. We noticed that to solve X in the equation, X squared equals negative one. We get the X value of plus minus I, which is a unit of an imaginary number. So we take the same approach and we subtract form both sides to get X on one side and the numerical value on the other. So it's X square is equal to negative. Four square root to get squared of X square is equal to the square root of four times the square root of negative one. You know that the squirt of negative one is plus minus I So we get X is equal to plus minus two high

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