Question

Tìm X:

\(\left(-4\right)^3+\left|x\right|=2021\)

Answer 1

Ta có: \(\left|x\right|+\left(-4\right)^3=2021\)

\(\Leftrightarrow\left|x\right|-64=2021\)

\(\Leftrightarrow\left|x\right|=2085\)

hay \(x\in\left\{2085;-2085\right\}\)

Answer 2

(-4)^3+|x|=2021

-64+|x|=2021

|x|=2021-(-64)

|x|=2085

=>x={-2085;2085}

Vậy x={-2085;2085}