SOLUTION: Solve the radical equation, and check all proposed solutions. Square root of 14x-21 equals x+2

Algebra ->  Equations -> SOLUTION: Solve the radical equation, and check all proposed solutions. Square root of 14x-21 equals x+2      Log On


   

Question 517939: Solve the radical equation, and check all proposed solutions.
Square root of 14x-21 equals x+2
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!




Square both sides:



Collect like terms:



Factor and solve the quadratic. Hint: it is a perfect square.

Hint: Since it is a perfect square, you will get one root with a multiplicity of 2. Hence, you only have to make one validity check. If you come up invalid, write back because you have an error somewhere.

John

My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism