A fraction is
said to be undefined
Consider:
Solution:
determine when the denominator equals 0. The NUMERATOR IS IGNORED. It is only necessary to investigate the denominator. The solution
to the above example is: 7  x = 0, or
x = 7.
Example 1:
To find the answer,
solve
5 + x = 0.
Example 2:
To find the answer,
solve y^{2}  2y  15 = 0.
