解方程(x+1)²-2(x+1)(3-x)+(x-3)²=0

题目

解方程(x+1)²-2(x+1)(3-x)+(x-3)²=0
(x+1)²-2(x+1)(3-x)+(x-3)²=0
我要完整的解题步骤 必有高分重谢

答案

(x+1)²-2(x+1)(3-x)+(x-3)²=0
(x+1)²+2(x+1)(x-3)+(x-3)²=0
[(x+1)+(x+3)]²=0
(2x+4)²=0
2x+4=0
解得x=-2