Algebra: Chapter 5-8, p 236
Subtraction of Polynomials
We do just like the addition of polynomials, except for subtraction, we (remember way back to subtracting with negative numbers) add the opposite. The other thing we have to remember is the sign problems for double negatives, make “Change-change” or “bling-bling” with 2 negatives!
You can do the subtraction horizontally or vertically. Horizontally requires that you scan across the polynomials. It’s easier for me to put the polynomials in descending order and then combine like terms, remembering the combining terms MUST HAVE THE DAME VARIABLE AND THE SAME EXPONENTS!
Vertically (or columns in the textbook) require you to write out the problem with spaces for missing terms. It is easier to line up terms this way and you can stick in other terms as well that are not common to both polynomials.
See here for more examples too.
Math-8, Chapter 7 Review
Complete the Chapter 7 Form 1A version of the test in preparation for tomorrow’s test!