a - bc - ab² from - 7b²a - 21 - a².
plz help me to solve this question.
subtract them
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Step-by-step explanation:
- 7b²a - 21 - a²-(a - bc - ab²)
- 7b²a - 21 - a²-a+bc+ab²
-6a²b-21-a²-a+bc
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