已知x+1分之x的平方+4x+4=0,先化简
问题描述:
已知x+1分之x的平方+4x+4=0,先化简
已知x²+4x+4/x+1=0,先化简x²/x-3+9/3-x,再求值
答
X ^ 2 +4 x +4开始/ X +1 = 0,
×2 +4 x +4开始= 0
第(x +2)2 = 0
X = -2
了 “呻/ zhidao.baidu.com / API / getdecpic?picenc = c5bb7969339317”>
X ^ 2/x-3 +9 / 3-X
=(×2 -9)/( X-3)
=(x +3开始)(X-3)/(X-3)
= X 3
= -2 3
= 1