Solve the equation.
-$4 t ^ { 3 } - 81 t = 0$
A) $- \frac { 9 } { 2 } , \frac { 9 } { 2 }$
B) $\frac { 9 } { 2 }$
C)0
D) $- \frac { 9 } { 2 } , \frac { 9 } { 2 } , 0$

Question

Quizplus · Accepted Answer

The equation can be factored as $t(4t^2 - 81) = 0$. This gives solutions $t = 0$ and $4t^2 - 81 = 0$. Solving $4t^2 - 81 = 0$ gives $t = \pm \frac{9}{2}$. Thus, the solutions are $-\frac{9}{2}, \frac{9}{2}, 0$.

Solve the Equation 4t3−81t=04 t ^ { 3 } - 81 t = 04t3−81t=0

Solve the Equation $4 t ^ { 3 } - 81 t = 0$