Question

Which of the following is a solution to sqrtx-2 + 5 = 1?
x= 6
x= 18
no solution
x=16

which of the following is a solution to 4 sqrtx+3 = 12
x=0
x=3
x=6
x=12

Answer 1

sqrt x-2=-4
square both sides

x-2 = 16
x=18

Answer 2

Second one:

Divide both sides by 4.

sqrt (x +3) = 3

Square both sides (whenever you square a square root, all you're left with is what was on the inside of the square root)

x+3 = 3^2

x+3 = 9

x = 6