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.