-4分之1x的4次方+9y²,x²-(x-y),已知4m+3n=90,2m-3n=10,求(m+2n)²-(3m-n)²的值,-4分之1x²y²+0.09,4x²-(x-y),101²-99²,
问题描述:
-4分之1x的4次方+9y²,x²-(x-y),已知4m+3n=90,2m-3n=10,
求(m+2n)²-(3m-n)²的值,-4分之1x²y²+0.09,4x²-(x-y),101²-99²,
答