Question

Use inspection to solve the equation x2=81
, then select the complete solution set below. If there are no real solutions, select “There are no real solutions.”(1 point)

{−9}


There are no real solutions.

{−9,9}


{9}

Answer 1

{x = −9, 9} — because x^2 = 81 implies x = ±√81 = ±9, so the solution set is {−9, 9}.