Finding Roots of a Rational Equation

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Taught by mrbrianmclogan
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Lesson Summary:

In this lesson, we learn how to find the values of x when a rational equation equals 0. By substituting in 0 for f(x), we can solve for x using basic algebra. It's important to remember not to confuse finding the value of the function when x equals 0 with finding the value of x when f(x) equals 0.

Lesson Description:

Finding the values of a rational equation when f(x) = 0

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Questions answered by this video:
  • What is the difference between f(0) and f(x)=0 ?
  • What must you do when you have a fractional algebraic expression or equation ?
  • What does (3x-4)/5 = 0 condense to after you have got rid of the denominator ?