If a^n= b, where a and b are real numbers and n is a positive integer, then a is an {\color{#009600}{n}}^\text{th} root of b. In our case, we want to find all the real square roots of 100.
a^2= 100
Because n=2 is even and b=100 is positive, there are two square roots of 100.
Positive Root:& a_1= sqrt(100)
Negative Root:& a_2=-sqrt(100)
Let's start with the positive root. Take the square root of b=100.
