Question

[Nguyen Thi Quynh Trang]

Bai 1: Tim so nguyen x, biet:

|x-3|=|x+5|

Neu cac ban biet loi giai thi ghi vao giup toi...

Answer 1

[Robecto Kinamoken]

Xét x>5:

\(\Rightarrow\)x-3=x+5

\(\Rightarrow\)-3=5(vô lí)

Xét 3<x<5:

\(\Rightarrow\)x-3=5-x

\(\Rightarrow\)x=4(thỏa mãn)

Xét x<3:

\(\Rightarrow\)3-x=5-x

\(\Rightarrow\)3=5(vô lí)

Vậy x=4