Answer:
1. (7x-8) - (2x+4)
Remove unnecessary parentheses.
7x - 8 - (2x + 4)
When there is a - sign before an expression and is in parentheses, change all the signs in the parentheses.
7x - 8 - 2x - 4
Collect like terms.
5x - 8 - 4
Simplify.
= 5x - 12
2. (5x² - 8x + 6) - (3x² - 3x + 2)
5x² - 8x + 6
- 3x² - 3x + 2
Subtract each column.
= 2x² - 5x + 4
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Answers & Comments
Answer:
1. (7x-8) - (2x+4)
Remove unnecessary parentheses.
7x - 8 - (2x + 4)
When there is a - sign before an expression and is in parentheses, change all the signs in the parentheses.
7x - 8 - 2x - 4
Collect like terms.
5x - 8 - 4
Simplify.
= 5x - 12
2. (5x² - 8x + 6) - (3x² - 3x + 2)
5x² - 8x + 6
- 3x² - 3x + 2
Subtract each column.
= 2x² - 5x + 4