(m+5分之m-3)^2+(m+5分之4-2m)^2=1,m等于多少?
问题描述:
(m+5分之m-3)^2+(m+5分之4-2m)^2=1,m等于多少?
答
(m-3)²/(m+5)²+(4-2m)²/(m+5)²=1
(m-3)²+(4-2m)²=(m+5)²
m²-6m+9+16-16m+4m²=m²+10m+25
4m²-32m=0
m=0或8