EDGE Math 8

Perform the indicated operations and simplify the resulting expression. Click on your answer.

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

x^{2} + 4 x y + 16 y^{2}

x^{2} + 8 x y + 16 y^{2}

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

none of the choices

Answer: $x^{2} + 8 x y + 16 y^{2}$

2.	${(5 a - 2 b)}^{2}$

25 a^{2} + 10 a b + 4 b^{2}

25 a^{2} - 10 a b + 4 b^{2}

25 a^{2} - 20 a b + 4 b^{2}

none of the choices

Answer: $25 a^{2} - 20 a b + 4 b^{2}$

3.	$(4 x + 3) (x^{2} - 5 x + 8)$

4 x^{3} - 23 x^{2} + 17 x + 24

4 x^{3} - 17 x^{2} + 17 x + 24

4 x^{3} - 23 x^{2} + 47 x + 24

none of the choices

Answer: $4 x^{3} - 17 x^{2} + 17 x + 24$

4.	$(10 p - 5 q) (6 a + b)$

60 a p - 10 b p + 30 a q - 5 b q

60 a p + 10 b p - 30 a q - 5 b q

60 a p - 10 b p - 30 a q - 5 b q

none of the choices

Answer: $60 a p + 10 b p - 30 a q - 5 b q$

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