How to find excluded values

Practice Questions

SAT Math › How to find excluded values

Questions

6

1

$y=\frac{x^2-5}{x^2-25}$

For what value(s) of x is the function undefined?

2

If the average (arithmetic mean) of , , and is , what is the average of , , and ?

3

Find the extraneous solution for

$\sqrt{x}=3x-4$

4

Which of the following provides the complete solution set for ?

5

Which of the following are answers to the equation below?

$\frac{x^2-4}{x^2+5x+6}=0$

I. -3

II. -2

III. 2

6

Find the excluded values of the following algebraic fraction

$\frac{2x^2-5x-12}{x^2-11x+28}$

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