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Sagot :
Answer:
9x
Step-by-step explanation:
(x² + 2x) - (x² - 7x) ← distribute parenthesis
= x² + 2x - x² + 7x ← collect like terms
= 9x
Answer:
9x
Step-by-step explanation:
( x ² + 2 x ) - ( x² - 7 x )
Simply the expression
- ➻ ( x ² + 2 x ) - ( x² - 7 x )
Remove unnecessary parantheses
- ➻ x² + 2x - x² + 7x
combine like terms
- ➻ x² - x² + 2x + 7x
- ➻ 9x
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