先化简,再求值:4m²-【6m-2(3m+2)-2m²】其中m=二分之一
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![先化简,再求值:4m²-【6m-2(3m+2)-2m²】其中m=二分之一](/uploads/image/z/758798-62-8.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9A4m%26%23178%3B-%E3%80%906m-2%EF%BC%883m%2B2%EF%BC%89-2m%26%23178%3B%E3%80%91%E5%85%B6%E4%B8%ADm%3D%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80)
先化简,再求值:4m²-【6m-2(3m+2)-2m²】其中m=二分之一
先化简,再求值:4m²-【6m-2(3m+2)-2m²】其中m=二分之一
先化简,再求值:4m²-【6m-2(3m+2)-2m²】其中m=二分之一
4m²-【6m-2(3m+2)-2m²】
=4m²-【6m-6m+-4-2m²】
=4m²+4+2m²
=6m²+4
=6x(1/2)²+4
=3/2+4
=5.5
=4m^2 - (6m - 6m - 4 - 2m^2)
=4m^2 +4+2m^2
=6m^2 +4
=6/4+4
=5.5