3(m+1)^2-5(m+1)+2(m-1)^2其中m=-5
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3(m+1)^2-5(m+1)+2(m-1)^2其中m=-5
3(m+1)^2-5(m+1)+2(m-1)^2其中m=-5
3(m+1)^2-5(m+1)+2(m-1)^2其中m=-5
3(m+1)^2-5(m+1)+2(m-1)^2
=(m+1)[3(m+1)-5]+2(m-1)^2
=(m+1)[3m+3-5]+2(m-1)^2
=(m+1)(3m-2)+2(m-1)^2
=(-5+1)(-5*3-2)+2(-5-1)^2
=(-4)(-17)+2(-6)^2
=68+2*36
=68+72
=140
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