已知(x-y)(x-y-6)+9=0,且x+y=5,求x,y的值

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 21:33:31
已知(x-y)(x-y-6)+9=0,且x+y=5,求x,y的值
x){}K5*t+5AΓS*+mMumlЩ|>i"}4ِaR"k `l5`;v-3*g Ov/(5@ 6yvP؀9NyɎ]*WPDQg$

已知(x-y)(x-y-6)+9=0,且x+y=5,求x,y的值
已知(x-y)(x-y-6)+9=0,且x+y=5,求x,y的值

已知(x-y)(x-y-6)+9=0,且x+y=5,求x,y的值
(x-y)(x-y-6)+9=0
(x-y)²-6(x-y)+9=0
(x-y-3)²=0
x-y-3=0
x+y=5
相加
2x-3=5
所以
x=4
y=5-x=1

答案为:x=4 y=1