A rational expression is a fraction with a variable in the denominator
ex: 1/x, x/y, 1/2x
but not: 1/2, 1/x^-2
Domain restrictions must be listed! (The denominator cannot equal zero.)
Mr. Schiffman would very much appreciate it if you always said, "I WILL FACTOR FIRST." He has faith in you! :)
To simplify a fraction, you remove common factors. To remove common factors, you must factor first!
Always leave your answer in its fully factored form-- don't try to foil it again.
Side note: Mr. Schiffman reminisces.
Mr. Schiffman's mom: "Doug, you've been a bad boy. You got an F-."
Mr. Schiffman: "But Mom, I like F's. Factor begins with F!"
Mr. Schiffman's mom: "You must be punished. Today, you cannot factor!"
Mr. Schiffman: *sad face* *tears*
notes and examples:
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