x^2=20

x= ??

Take the square root of both sides of the equation to find the value of x.

There will be both positive and negative answers, and the number is between 4 and 5. (or -4 and -5)

so would i write , x=-4,4,-5,5 ?

No, you should do the square root calculation yourself. If you do not have a hand calculator or a "log table", use

http://www.math.com/students/calculators/source/square-root.htm

To solve the equation x^2 = 20 for x, there are a few methods you can use. One way is to take the square root of both sides of the equation.

Step 1: Write the equation x^2 = 20.
Step 2: Take the square root of both sides. √(x^2) = √20.
Step 3: Simplify. x = √20.
Step 4: Calculate the square root of 20. x ≈ ±4.472.

So, x is approximately equal to ±4.472.