6.1.2 Adding and Subtracting Polynomials (continued) Example 4 Subtracting Polynomials Horizontally
Recall that subtracting a number is the same as adding its opposite (e.g., 3 − 5 = 3 + − 5). To subtract a polynomial, add the opposite of that polynomial and then combine like terms, as demonstrated by Prof. Burger in Example 4.
Example 5 Business Application
In Example 5, Prof. Burger writes a polynomial expression for the profit generated by selling x model kits, using the fact that profit is equal to revenue minus cost. He then evaluates that expression for x = 300,000 to find the profit earned for selling 300,000 model kits.
17
Made with FlippingBook - Share PDF online