m²x²-3m=2(4-m)-x(m为已知数)
问题描述:
m²x²-3m=2(4-m)-x(m为已知数)
答
m²x²-3m=2(4-m)-x
m²x²-3m-8+2m+x=0
m²x²+x-m-8=0
a=m².b=x.c=-(m+8)
然后分成有解与无解的情况讨论.如果lz还不懂再问吧