9.1 Finding Square Roots – We learned to find and simplify square roots of numbers. Then we discovered that a positive number has two square roots. Next we determined that there is no square root of a negative number because the product of any two nonzero numbers must be positive. Then we practiced estimating a square root between two perfect squares. Next we practiced classifying real numbers. We learned that a rational number can be expressed as a ratio of two integers a/b with b not equal to zero. In decimal form a rational number either terminates or repeats. An irrational number has decimal form that neither terminates nor repeats and it cannot be written as the ratio of two integers. Then we found that together rational and irrational numbers form real numbers. We found that if an integer is not a perfect square its square root is irrational.