EDGE Math 8

1.	$(15 + 4 q) (15 - 4 q)$

225 - 60 q - 16 q^{2}

225 - 120 q - 16 q^{2}

225 - 16 q^{2}

none of the choices

Answer: $225 - 16 q^{2}$

2.	$(w^{2} - 0.5 z) (w^{2} + 0.5 z)$

w^{4} - 0.25 z^{2}

w^{4} - 2.5 z^{2}

w^{4} - w^{2} z - 2.5 z^{2}

none of the choices

Answer: $w^{4} - 0.25 z^{2}$

3.	${(4 x + 3 y)}^{2}$

16 x^{2} + 24 x y + 9 y^{2}

16 x^{2} + 12 x y + 9 y^{2}

16 x^{2} + 9 y^{2}

none of the choices

Answer: $16 x^{2} + 24 x y + 9 y^{2}$

4.	${(7 x^{2} - 2)}^{2}$

49 x^{4} + 4

49 x^{4} - 14 x - 4

49 x^{4} - 28 x^{2} + 4

none of the choices

Answer: $49 x^{4} - 28 x^{2} + 4$

5.	${(3 m + n)}^{3}$

27 m^{3} + 27 m^{2} n + 9 m n^{2} + n^{3}

27 m^{3} + 27 m^{2} n + 27 m n^{2} + n^{3}

27 m^{3} + 9 m^{2} n + 9 m n^{2} + n^{3}

none of the choices

Answer: $27 m^{3} + 27 m^{2} n + 9 m n^{2} + n^{3}$