4c(-a+b+c) - 3a(a+b+c)-2b(a-b+c) find
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Answer:
-4ac+4bc+4c²-3a²+3ab+3ac-2ab-2b²+2bc
-4ac+3ac+4bc+2bc+3ab-2ab+4c²-3a²-2b²
-4ac+3ac will cancel
+3ab-2ab will cancel
ans=6bc+4c²-3a²-2b²
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