Solve the equation by extracting the square roots.
-$$2 x ^ { 2 } = 16$$
A) $x = 2 \sqrt { 2 }$ or $x = - 2 \sqrt { 2 }$
B) $x = 2$
C) $x = 2 \sqrt { 2 }$
D) $x = 2$ or $x = - 2$

Question

Quizplus · Accepted Answer

First, divide both sides by 2 to get $x^2 = 8$. Then, take the square root of both sides to find $x = \sqrt{8}$ or $x = -\sqrt{8}$, which simplifies to $x = 2\sqrt{2}$ or $x = -2\sqrt{2}$.

Solve the Equation by Extracting the Square Roots 2x2=162 x ^ { 2 } = 162x2=16

Solve the Equation by Extracting the Square Roots $2 x ^ { 2 } = 16$