Question 1 (Multiple Choice Worth 2 points)
Factor completely: 21x3 + 35x2 + 9x + 15
(3x − 5)(7x2 − 3)
(3x − 5)(7x2 + 3)
(3x + 5)(7x2 − 3)
prime

Question 2 (Multiple Choice Worth 2 points)
Factor completely: 10xy + 3y + 20ax + 6a
(10x − 3)(y − 2a)
(10x − 3)(y + 2a)
(10x + 3)(y + 2a)
(10x + 3)(y − 2a)

Question 3 (Multiple Choice Worth 1 points)
Factor completely: 5ab + 3ay + 5b + 3y
(5b + 3y)(a + 1)
(5b − 3y)(a + 1)
(5b + 3y)(a − 1)
Prime

Question 4 (Multiple Choice Worth 1 points)
Factor completely: 5x(x + 3) + 6(x + 3)
(x + 3)(30x)
(x + 3)(5x + 6)
(x + 3)(11x)
Prime

Question 5 (Multiple Choice Worth 1 points)
Factor completely: 3ab − 5ax + 9b − 15x
(3b + 5x)(a + 3)
(3b − 5x)(a + 3)
(3b − 5x)(a − 3)
Prime

Question 6 (Multiple Choice Worth 2 points)
Factor completely: 14bx2 − 7x3 − 4b + 2x
(2b + x)(7x2 + 2)
(2b − x)(7x2 − 2)
(2b + x)(7x2 − 2)
Prime

Question 7 (Multiple Choice Worth 1 points)
Factor completely: 9xy + 36x − 10y − 40
Prime
(y − 4)(9x − 10)
(y + 4)(9x + 10)
(y + 4)(9x − 10)
4 Answers

Seriously....is this like your entire assignment????

1.
(3x − 5)(7x^2 − 3) = (3x)(7x^2) + (3x)(3) + (5)(7x^2) + (5)(3)
= 21x^3  9x  35x^2 +15
= 21x^3  35x^2  9x + 15.
Not equal.
(3x − 5)(7x2 + 3) = 21x^3 + 9x  35x^2 ...
Not equal.
(3x + 5)(7x2 − 3) = 21x^3  9x ...
Not equal.
By process of elimination, "prime" is the answer.
Source(s): Me! 
Just expand all the answers and find out which one matches the question. TahDah.

2cb + 7cx + 2b + 7x = (2cb + 7cx) + (2b + 7x) = c (2b + 7x) + a million (2b + 7x) = (2b + 7x) (c + a million) 14bx^2 ? 7x^3 ? 4b + 2x = 7x^2 (2b ? x) ? 2 (2b ? 2x) = (2b ? x) (7x^2 ? 2) resolve the different 2 making use of comparable technique