(3m²-m+5)-(m+4)化简

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(3m²-m+5)-(m+4)化简
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(3m²-m+5)-(m+4)化简
(3m²-m+5)-(m+4)化简

(3m²-m+5)-(m+4)化简
原式=3m²-m+5-m-4
=3m²-2m+1

=3m²-2m+1

=3m²-2m+1
=3(m²-2/3m)+1
=3(m-1/3)²+2/3