Choose the one alternative that best completes the statement or answers the question.
Solve the equation.
-$$9 s ^ { 2 } = 4$$
A) $\left\{ \frac { 3 } { 2 } \right\}$
B) $\left\{ - \frac { 2 } { 3 } , \frac { 2 } { 3 } \right\}$
C) $\left\{ \frac { 2 } { 3 } \right\}$
D) $\left\{ - \frac { 3 } { 2 } , \frac { 3 } { 2 } \right\}$

Question

Quizplus · Accepted Answer

To solve $9s^2 = 4$, divide both sides by 9 to get $s^2 = \frac{4}{9}$. Taking the square root of both sides gives $s = \pm\frac{2}{3}$, which corresponds to choice B.

Choose the One Alternative That Best Completes the Statement or Answers