Which expression is NOT equivalent to the other three?

Question

A) −9 − 7n + 16n
B) 9(n − 9)
C) n − 9 + 8n
D) 9n − 9
I am unsure hot to do this can someone please lead me into the righ direction and help me solve it

Answer 1

Can someone also help me on these
2. The length of a rectangle is represented by (6x − 2), and the width is represented by (x − 1). Which expression best represents the area of the rectangle?
A) 6x2 + 8x + 2
B) − 8x + 2
C) 6x2 − 8x + 2
D) 6x2 − 8x − 2***

3.What is the complete factorization of x4 - y4 ?
A) (x2 + y)(x - y) (x - y)
B) (x2 + y2)(x + y) (x - y)
C) (x2 + y2)(x - y) (x - y)***
D) (x2 + y2)(x + y) (x + y)

Answer 2

For the first question simplify each and see which ones are equal.
We can do a) together... collect like terms so the -7n and the 16n go together
= 9n - 9
and take a look at d)
that is the same answer as a)
Now you try b) and c) and see what you get : )

Answer 3

#3 is correct : )

Answer 4

2) is incorrect because a negative times a negative number is a positive number...
check your work...

Answer 5

I was confused on #2 can u help me on that one

Answer 6

(6x -2)(x - 1)
= (6x)(x) -1(6x) -2(x) -1(-2
= ....

Answer 7

#3 is INCORRECT