先化简再求值 当m=0.3时,求2m—6㎡的值.还有,6㎡=6m×6m吗?

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先化简再求值当m=0.3时,求2m—6㎡的值.还有,6㎡=6m×6m吗?先化简再求值当m=0.3时,求2m—6㎡的值.还有,6㎡=6m×6m吗?先化简再求值当m=0.3时,求2m—6㎡的值.还有,6㎡

先化简再求值 当m=0.3时,求2m—6㎡的值.还有,6㎡=6m×6m吗?
先化简再求值 当m=0.3时,求2m—6㎡的值.
还有,6㎡=6m×6m吗?

先化简再求值 当m=0.3时,求2m—6㎡的值.还有,6㎡=6m×6m吗?
2m—6㎡
=2m(1-3m)
=2×0.3×(1-3×0.3)
=0.06
6㎡与6m×6m不相等
6㎡=6×m×m

2m-6m^2=2m(1-3m)
带入m=0.3 得2m(1-3m)=0.6*0.1=0.06
6㎡不等于6m×6m,,而是等于6*m*m