Answer: {8, 2}
Step-by-step explanation: Move the -9 to the right side.
So we have (x - 5)² = 9.
Square rooting both sides, we have x - 5 = ± 3.
Always use plus or minus when square
rooting both sides of an equation.
So either x - 5 = 3 or x - 5 = -3.
Solving each equation from here, our solution is {8, 2}.
