SOLUTION: Explain why the equation x^2 = 4 has two real number solutions, while the equation the square root of x = 2 has only one real number solution.
Algebra ->
Square-cubic-other-roots
-> SOLUTION: Explain why the equation x^2 = 4 has two real number solutions, while the equation the square root of x = 2 has only one real number solution.
Log On
Question 320030: Explain why the equation x^2 = 4 has two real number solutions, while the equation the square root of x = 2 has only one real number solution. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Explain why the equation x^2 = 4 has two real number solutions, while the equation the square root of x = 2 has only one real number solution.
--------------
Solve x^2 = 4
x^2-4 = 0
Factor:
(x-2)(x+2) = 0
x = 2 or x = -2
-----------------------
Solve sqrt(x) = 2
Square both sides to get:
x = 4
============================
Cheers,
Stan H.
(