Solve the equation using the square root property.
-$$\mathrm { x } ^ { 2 } - 81 = 0$$
A) $\{ - 9 \}$
B) $\{ 9 , - 9 \}$
C) $\{ 81 \}$
D) $\{ 9 \}$

Name: Solve the equation using the square root property. -\[\mathrm { x } ^ { 2 } - 81 = 0\] A) $\{ - 9 \}$ B) $\{ 9 , - 9 \}$ C) $\{ 81 \}$ D) $\{ 9 \}$
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Question

Quizplus · Accepted Answer

The equation $x^2 - 81 = 0$ can be rewritten as $x^2 = 81$. Taking the square root of both sides gives $x = \pm9$, which means the solution set is $\{9, -9\}$.

Solve the Equation Using the Square Root Property x2−81=0\mathrm { x } ^ { 2 } - 81 = 0x2−81=0

Solve the Equation Using the Square Root Property $\mathrm { x } ^ { 2 } - 81 = 0$