问题
填空题
已知-2<x<5,化简
|
答案
∵-2<x<5,
∴
=|x+2|=x+2,x2+4x+4
=|5-x|=5-x,25-10x+x2
∴
+x2+4x+4
=x+2+5-x=7.25-10x+x2
已知-2<x<5,化简
|
∵-2<x<5,
∴
=|x+2|=x+2,x2+4x+4
=|5-x|=5-x,25-10x+x2
∴
+x2+4x+4
=x+2+5-x=7.25-10x+x2