Subtract
3a( a+ b+c) - 2b(a+b+c)
from 4c(_a+b+c )
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Step-by-step explanation:
4c(a+b+c) - 3a(a+b+c) + 2b(a+b+c)
= 4ac+4bc+4c^2 - 3a^2 - 3ab- 3ac + 2ab+ 2b^2+2bc
= ac+6bc+4c^2-3a^2+2b^2-ab
=4c^2-3a^2+2b^2-ab+ac+6bc
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