Question

[Hữu Phúc Phạm]

Tìm xϵZ sao cho:

a)x+4⋮x

b)(75-x)(x+32)(x-58)=0

Answer 1

[Nguyễn Đăng Nhân]

a)

\(x+4⋮x\)

\(\Rightarrow\left(x+4\right)-x⋮x\)

\(\Rightarrow4⋮x\)

\(\Rightarrow x\in\left\{1;-1;2;-2;4;-4\right\}\)

b) \(\left(75-x\right)\left(x+32\right)\left(x-58\right)=0\)

\(\Rightarrow75-x=0;x+32=0;x-58=0\)

\(\Rightarrow x=75;x=-32;x=58\)

Answer 2

[Phạm Quang Anh]

Ngu