Answer:
-b
Step-by-step explanation:
❖ Step 1: Apply distributive property.
- [tex](-1)(a) + (-1)(b)+a[/tex]
- [tex]-a-b+a[/tex]
❖ Step 2: Combine like terms.
- [tex](-a+a)+(-b)[/tex]
- [tex]-b[/tex]
Therefore, the answer is -b.
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