Question

Solve the inequality -x^3-4x 13 years ago

Answer 1

\[0\leq x^3+4x\]
\[0\leq x(x^2+4)\]and now since \(x^2+4\geq 4\) only need \(0\leq x\)

Answer 2

So the answer is 0<=x

Answer 3

that is what i get, yes