4×(x-5)的平方=(x-5)(x+5)解方程

4×(x-5)的平方=(x-5)(x+5)解方程

4(x-5)^2=(x-5)(x+5)
4(x-5)^2-(x-5)(x+5)=0
(x-5)(4(x-5)-x-5)=0
x1=5 x2=5