Solve the equation. $2 x ^ { 3 } - 72 x = 0$
A) $\{ - 7,0,6 \}$
B) $\{ - 7,0,7 \}$
C) $\{ - 6,0,6 \}$
D) $\{ - 8,8 \}$
E) none of these

Name: Solve the equation. $2 x ^ { 3 } - 72 x = 0$ A) $\{ - 7,0,6 \}$ B) $\{ - 7,0,7 \}$ C) $\{ - 6,0,6 \}$ D) $\{ - 8,8 \}$ E) none of these
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Question

Quizplus · Accepted Answer

Factor out $2x$ to get $2x(x^2-36)=0$. Then, $2x=0$ gives $x=0$. Solving $x^2-36=0$ gives $x=\pm6$, so the solutions are $\{-6,0,6\}$. Thus, the answer is choice (C).

Solve the Equation 2x3−72x=02 x ^ { 3 } - 72 x = 02x3−72x=0

Solve the Equation $2 x ^ { 3 } - 72 x = 0$