Can Denominator Be Zero?

if we ever have 0 in the denominator, all we can say is that the fraction is “undefined.”

How do you make a denominator 0?

To find out which values of x make the denominator zero, treat the denominator as an equation, set it equal to zero, and solve for x. You may have to factor the equation first, or it may already be in factored form. When you have a product of factors, you find the value of x that makes each factor = 0.

Why do we not want the denominator to equal zero?

The denominator in a fraction cannot be zero because division by zero is undefined. So we need to figure out what values of the variable(s) in the expression would make the denominator equal zero. These values cannot be included in the domain, so they're called excluded values.