Question

Solve for x, given the equation Square root of x plus 9 − 4 = 1.

Answer 1

√x + 9 - 4 = 1
     √x + 5 = 1
           √x = -4
           √x = √-4
             x = 2i

Answer 2

√x + 9 - 4 = 1.
√x + 5 = 1
Subtract five from both sides of the equation: √x = -4 
x = -16.
Check: -√16 + 9 - 4 = 1
1 = 1