Solve for x, given the equation square root of x plus 9 − 4 = 1.
x = 16, solution is not extraneous
x = 16, solution is extraneous
x = 34, solution is not extraneous
x = 34, solution is extraneous

The given condition may be mathematically expressed as,
                               sqrt (x) + 9 - 4 = 1
Group all the constants to the same side of the equation,
                                  sqrt (x) = -4
Squaring both sides give an answer of x = 16.
The answer for the question above is x = 16 is not an extraneous root because if we substitute this value to the x of the equation, the equation becomes true. 

The answer would be b

300b(x) is graphed by the functio