EDGE Math 8

1.	$- 3 x (x^{3} + 5 x^{2} + 7 x - 10)$

- 3 x^{4} - 15 x^{3} - 21 x^{2} + 30 x

- 3 x^{4} + 15 x^{3} + 21 x^{2} - 30 x

3 x^{4} + 15 x^{3} + 21 x^{2} - 30 x

none of the choices

Answer: $- 3 x^{4} - 15 x^{3} - 21 x^{2} + 30 x$

2.	$2 b (3 a^{2} b + a b^{2} - 6)$

6 a^{2} b^{2} + 2 a b^{3} - 12 b

6 a^{2} b^{2} + a b^{3} - 6 b

6 a^{2} b^{2} + 2 a b^{3} + 12 b

none of the choices

Answer: $6 a^{2} b^{2} + 2 a b^{3} - 12 b$

3.	$\frac{1}{3} p (3 p^{2} - 9 p - 81)$

p^{3} + 3 p^{2} + 27 p

p^{3} - 9 p^{2} - 81 p

p^{3} - 3 p^{2} - 27 p

none of the choices

Answer: $p^{3} - 3 p^{2} - 27 p$

4.	$\frac{4}{5} t^{2} (5 t - t^{3} + 35 t^{5})$

\frac{4}{5} t^{3} - \frac{4}{5} t^{5} + 28 t^{7}

4 t^{3} - 4 t^{5} + 28 t^{7}

4 t^{3} - \frac{4}{5} t^{5} + 28 t^{7}

none of the choices

Answer: $4 t^{3} - \frac{4}{5} t^{5} + 28 t^{7}$

5.	$(2 x + 5) (4 x + 3)$

8 x^{2} + 14 x + 15

8 x^{2} + 26 x + 15

8 x^{2} + 15 x + 15

none of the choices

Answer: $8 x^{2} + 26 x + 15$