Choose a reasonable method for solving the equation. Round your answers to three decimal places. $7 x ^ { 2 } = 15$
A) $x = 1.464 , x = - 1.464$
B) $x = 1.464 , x = - 1.809$
C) $x = 1.487 , x = - 1.464$
D) $x = 1.809 , x = - 1.809$
E) no real-number solution

Question

Quizplus · Accepted Answer

To solve the equation $7x^2 = 15$, divide both sides by 7 to get $x^2 = \frac{15}{7}$, then take the square root of both sides to find $x = \pm\sqrt{\frac{15}{7}}$, which simplifies to $x = \pm1.464$.

Choose a Reasonable Method for Solving the Equation 7x2=157 x ^ { 2 } = 157x2=15

Choose a Reasonable Method for Solving the Equation $7 x ^ { 2 } = 15$