1)
answer is B) second choice
2
----------------------- =
x^2 + 6x + 8
2
= -------------------
(x -2)(x - 4)
if x = 2 and x = 4 then results would be undefined
2)
3x - 1
--------------
x^2 - 4x - 45
3x - 1
= -------------
(x - 9)(x+5)
x can't equal 9 and (-5)
so answer are:
A and D (first and last choices)
3)
answer is B, second choice (GCF 6x^3)
18x^5 - 6x^3 6x^3(3x^2 - 1) 3x^2 - 1
----------------- = ------------------------- = -----------------
12x^4 6x^3(2x) 2x
4)
15x^3 - 10x^2 5x^2 (3x - 2) 3x - 2
-------------------- = ------------------------ = -------------------------
25x^3 5x^2(5x) 5x
answer is B( second choice)
i don't see 5 and 6 but 7 and 8 twice
7)
(x- 7)(2x -6) 2(x-3)
= -------------------------- = --------------------
x (x -7)(x+6) x(x + 6)
answer is B)(second choice)
8)
(2x + 3)(x+8) 2x +3
= ------------------------ = ------------------
(x+8)(x - 8) x - 8
answer is C (third choice)
