EDGE Math 8

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Result

Choose the correct answer to each question.

1.	If $A = - 5 x + 3,$ what is $- A$ equal to?

3 - 5 x

- 5 x - 3

5 x - 3

\frac{1}{- 5 x + 3}

Answer: $5 x - 3$

2.	What is the simplest form of $\frac{p - 1}{1 - p^{2}} ?$

\frac{1}{1 - p}

- 1

\frac{- 1}{1 + p}

\frac{- 1}{1 - p}

Answer: $\frac{- 1}{1 + p}$

3.	What is the simplest form of $\frac{8 x^{2} (x - 1)}{36 x (x^{2} - 2 x + 1)} ?$

\frac{2 x}{9 x - 1}

\frac{2 x}{9 (x - 1)}

\frac{4 x}{18 x - 1}

\frac{2}{9 x - 1}

Answer: $\frac{2 x}{9 (x - 1)}$

4.	What is $a^{- 2} + 2 b^{- 1}$ in simplest form?

\frac{a^{2} + 2 b}{a^{2} b}

\frac{a^{2} + 2 b}{2 a^{2} b}

\frac{2 a^{2} + b}{a^{2} b}

\frac{2 a^{2} + b}{2 a^{2} b}

Answer: $\frac{2 a^{2} + b}{a^{2} b}$

5.	Which of the following is not equal to $\frac{1}{2} ?$

\frac{8 x^{3} + 1}{16 x^{3} + 2}

\frac{- (2 x^{2} - 8)}{16 x - 4 x^{2}}

\frac{7 x (x + 4)}{56 x + 14 x^{2}}

\frac{x^{2} + 5}{2 x^{2} + 5}

Answer: $\frac{x^{2} + 5}{2 x^{2} + 5}$

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