Use inspection to solve the equation x^2 = 81, then select the complete solution set below if there are no real solutions, select “there are no real solutions”

Question

A.{-9,9}
B. There are no real solutions
C. {-9}
D. {9}

Answer 1

To solve the equation \( x^2 = 81 \) using inspection, we can take the square root of both sides.

The solutions to this equation are:

\[ x = \sqrt{81} = 9 \] and \[ x = -\sqrt{81} = -9 \]

Thus, the complete solution set is:

\[ {-9, 9} \]

The correct option is:

A. {-9, 9}