Solve the inequality.
-$$x ^ { 2 } + 4 x \geq 0$$
A) $( - \infty , - 4 ]$ or $[ 0 , \infty )$
B) $[ 0,4 ]$
C) $[ - 4,0 ]$
D) $( - \infty , 0 ]$ or $[ 4 , \infty )$

Question

Quizplus · Accepted Answer

Factor the inequality to $x(x + 4) \geq 0$. The roots are $x = 0$ and $x = -4$. The inequality is satisfied for $x \leq -4$ and $x \geq 0$, hence the correct intervals are $(-\infty, -4]$ and $[0, \infty)$.

Solve the Inequality x2+4x≥0x ^ { 2 } + 4 x \geq 0x2+4x≥0

Solve the Inequality $x ^ { 2 } + 4 x \geq 0$