EDGE Math 8

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1.	Which of the following expressions is equal to $(47) (53) ?$

50^{2} - 3^{2}

50^{2} + 3^{2}

50^{3} - 3^{3}

50^{3} + 3^{3}

Answer: $50^{2} - 3^{2}$

2.	What is the GCF of $12 x^{3} y^{3}$ and $8 x^{2} y^{4} ?$

2 x^{3} y^{4}

4 x^{2} y^{3}

8 x^{3} y^{3}

12 x^{3} y^{4}

Answer: $4 x^{2} y^{3}$

3.	Which of the following is not a difference of two squares?

1 - a^{2}

b^{2} - 6

x^{4} - y^{4}

4 p^{2} - 9 r^{2}

Answer: $b^{2} - 6$

4.	Which of the following is not a perfect square trinomial?

x^{2} + 6 x + 9

x^{2} - 10 x + 25

4 x^{2} + 4 x + 1

4 x^{2} - 6 x + 9

Answer: $4 x^{2} - 6 x + 9$

5.	Which of the following is a prime polynomial?

x^{2} - 64

x^{2} + 64

x^{3} - 64

x^{3} + 64

Answer: $x^{2} + 64$

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