SOLVING RATIONAL EQUATIONS Lesson 48. What are rational equations?

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Presentation transcript:

SOLVING RATIONAL EQUATIONS Lesson 48

What are rational equations?

What do you do…

What do you do… Once youve cross multiplied, distribute any terms an solve for the missing variable. Ex: 2(x) = 3(x + 2) 2x = 3x x -x = 6 x = -6

What else could you do? If you need to add or subtract rational expressions to solve the equation, FIND A COMMON DENOMINATOR FOR ALL THE FRACTIONS. Once all the fractions have a common denominator, you can REMOVE THE DENOMINATORS AND MAKE AN EQUATION WITH JUST THE NUMERATORS.

What else could you do?

What else could you do? Ex: 1(x + 1) + 3x = 2(x + 1) x x = 2x + 2 4x + 1 = 2x + 2 2x + 1 = 2 2x = 1 x = ½

Practice a few