Solve the equation.
-$$25 = b ^ { 2 / 3 }$$
A) $\{ 125 \}$
B) $\{ - 125,125 \}$
C) $\{ 5 \}$
D) $\{ - 5,5 \}$

Name: Solve the equation. -\[25 = b ^ { 2 / 3 }\] A) $\{ 125 \}$ B) $\{ - 125,125 \}$ C) $\{ 5 \}$ D) $\{ - 5,5 \}$
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Question

Quizplus · Accepted Answer

Cube both sides of the equation to get rid of the exponent:$$25^3 = (b^{2/3})^3$$$$15625 = b^2$$Take the square root of both sides:$$\sqrt{15625} = \sqrt{b^2}$$$$125 = b$$So the solution is $b = 125$ or $b = -125$.

Solve the Equation 25=b2/325 = b ^ { 2 / 3 }25=b2/3

Solve the Equation $25 = b ^ { 2 / 3 }$