x^2=20
x= ??
4 answers
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
http://www.math.com/students/calculators/source/square-root.htm