SOLUTION: Find the x-intercept(s) of the graph of the function without graphing the function.
{{{ f(x) = sqrt(2x+21)- sqrt(2x)-3 }}}
Algebra.Com
Question 629009: Find the x-intercept(s) of the graph of the function without graphing the function.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
\ =\ \sqrt{2x\ +\ 21}\ -\ \sqrt{2x}\ -\ 3)
Set the function equal to zero since zero is the value of the function at the 
intercept(s). Solve for
Add 
to both sides:
Square both sides
Collect like terms
Multiply by 
Square both sides
Solve for , then check your answer by substitution into the original equation.
John
My calculator said it, I believe it, that settles it
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