(x-m)^2-4m^2=0

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(x-m)^2-4m^2=0(x-m)^2-4m^2=0(x-m)^2-4m^2=0答:(x-m)²-4m²=0(x-m)²=4m²(x-m)²=(2

(x-m)^2-4m^2=0
(x-m)^2-4m^2=0

(x-m)^2-4m^2=0
答:
(x-m)²-4m²=0
(x-m)²=4m²
(x-m)²=(2m)²
两边同时开二次方得:
x-m=2m或者x-m=-2m
所以:
x=3m或者x=-m