Question

Which is a factor of 6x^2y + 8x^2 - 30y - 40?
a. x - 4
b. 3y + 4
c. x^2 + 4
d. 3y - 5

Answer 1

@ankit042

Answer 2

@eliassaab @whpalmer4

Answer 3

\[6x^2y+8x^2-30y-40\]

First, are there any common factors to each term?

Answer 4

x^2

Answer 5

@whpalmer4

Answer 6

Uh, I don't see an \(x^2\) in each of the four terms...

Answer 7

Oh whoops then no

Answer 8

One of them doesn't have any variables whatsoever, and another one only has \(y\).
How about in the coefficients?

Answer 9

Nope

Answer 10

Seriously?

What are the factors of 6?

Answer 11

Omg I'm braindead today 2 can go in to all of those terms

Answer 12

Yes, much better :-)

So if we factor out a 2, what is left?

Answer 13

How do I do that I literally am forgetting everything D:

Answer 14

Divide each coefficient by 2.

Answer 15

3x^2y+4x^2-15y-20

Answer 16

Good. Now, here's where it's going to be a bit tricky if you're as rusty at algebra as you seem to be...

Answer 17

You need to do division of the polynomial by the various answer choices...

Answer 18

I'll give you a hint: it's one of the answer choices that has a \(y\) in it