In this lesson, we learn how to subtract two functions. The key formula to remember is f minus g of x equals f of x minus g of x. We are then shown how to apply this formula to two functions, 2x minus 5 and 2 minus f, emphasizing the importance of using parentheses when dealing with the whole function. By distributing the negative sign and combining like terms, we arrive at 3x minus 7.
Subtraction of two functions
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How do I subtract two functions?
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The instructor gives an example showing how to subtract two functions. He emphasizes using parenthesis and distributing the negative.