How do you solve #100=25x^2#?

1 Answer
Aug 15, 2017

Answer:

#x=2 and x=-2#

Explanation:

We can solve this by using square root method
So first we need to isolate the square (divide 25 on both sides of the equation) which give us #x^2=4#
Now take the #+-# square root on both sides of the equation in order to get rid of the square because square root is the opposite of the square so they cancel each other.
#x=+-2#