1 / 6

Subtracting Linear Expressions

Subtracting Linear Expressions. The subtraction sign in front of an expression in parentheses means that you subtract EACH TERM in the parentheses, not just the first term. When subtracting expressions, we can rewrite the problem as adding the opposite, or the additive inverse. .

tarmon
Download Presentation

Subtracting Linear Expressions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Subtracting Linear Expressions

  2. The subtraction sign in front of an expression in parentheses means that you subtract EACH TERM in the parentheses, not just the first term. • When subtracting expressions, we can rewrite the problem as adding the opposite, or the additive inverse. Ex. 1) Simplify. (8x + 3) – (6x + 2) Rewrite as adding the additive inverse. (8x + 3) + (-6x + -2) 8x + 3 + -6x + -2 Rewrite vertically with like terms in columns. 2x + 1 Combine columns.

  3. Ex. 2) Simplify. (-6x + 1) – (2x – 5) Rewrite as adding the additive inverse. (-6x + 1) + (-2x +5) -6x + 1 + -2x + 5 Rewrite vertically with like terms in columns. -8x + 6 Combine columns.

  4. Ex. 3) Simplify. (-5x – 9) – (-6x – 1) Rewrite as adding the additive inverse. (-5x – 9) + (+6x + 1) -5x + -9 + 6x + 1 Rewrite vertically with like terms in columns. 1x + -8 = 1x – 8 Combine columns.

  5. Ex. 4) Subtract (-2x + 5) from (-4x – 7). Be careful with order as you set up the subtraction problem! (-4x – 7) – (-2x + 5) Rewrite as adding the additive inverse. (-4x – 7) + (+2x + -5) -4x + -7 + 2x + -5 Rewrite vertically with like terms in columns. -2x + -12 = -2x – 12 Combine columns.

  6. Ex. 5) Simplify. Rewrite as adding the additive inverse. Rewrite vertically with like terms in columns. = Get common denominators before adding fractions. Combine columns.

More Related