8(x+2y)的m+4次方/[-2(x+2y)的m+2次方]

问题描述:

8(x+2y)的m+4次方/[-2(x+2y)的m+2次方]
20:50前
21:

8(x+2y)的m+4次方/[-2(x+2y)的m+2次方]
=-4(x+2y)²
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