Question

A) x+1 là ước của 2x-2

B)-6 chia hết cho (2x+2)

C)(3x-1) chia hết (x+1)

Answer 1

a: \(\Leftrightarrow2x+2-4⋮x+1\)

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

hay \(x\in\left\{0;-2;1;-3;3;-5\right\}\)

b: \(\Leftrightarrow2x+2\in\left\{1;-1;2;-2;3;-3;6;-6\right\}\)

hay \(x\in\left\{-\dfrac{1}{2};-\dfrac{3}{2};0;-2;\dfrac{1}{2};-\dfrac{5}{2};2;-4\right\}\)

c: \(\Leftrightarrow3x+3-4⋮x+1\)

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

hay \(x\in\left\{0;-2;1;-3;3;-5\right\}\)