SOLUTION: The square root of 5x+21=x+3...what is x and how did you figure it out?
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Question 137329: The square root of 5x+21=x+3...what is x and how did you figure it out?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
First step, square both sides to get rid of the radical.
Expand the right hand side.
Bring all terms over to the left hand side.
Multiply both sides by -1.
Factor your quadratic equation.
x=-4 and x=3 are both solutions.
Check your answers.
x=3
True statement. Good answer.
x=-4
True statement, since .
Good answer.
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