计算 2(m^2-3m+4)-3(2m-m^2)

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计算 2(m^2-3m+4)-3(2m-m^2)
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计算 2(m^2-3m+4)-3(2m-m^2)
计算 2(m^2-3m+4)-3(2m-m^2)

计算 2(m^2-3m+4)-3(2m-m^2)
2(m^2-3m+4)-3(2m-m^2)
=2m²-6m+8-6m+3m²
=5m²-12m+8;
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解2(m^2-3m+4)-3(2m-m^2)
=2m^2-6m+8-6m-3m^2
=-m^2-12m+8

2(m^2-3m+4)-3(2m-m^2)
=2m^2-6m+8-6m+3m^2
=5m^2-12m+8

=2m^2-6m+8-6m+3m^2
=5m^2-12m+8