Ask your own question, for FREE!
Mathematics 23 Online
OpenStudy (anonymous):

Simplify (x^2 + 7x + 12)(x^2 + 3x + 5)

OpenStudy (anonymous):

@agent0smith @amoodarya @chucky00

OpenStudy (agent0smith):

Easier with the drawing button... there's no easy way to show this, but you have to multiply each term in the first set of brackets, by each term in the second set.

OpenStudy (anonymous):

Right I get that I just don't wanna do ittttttttttttttttt. D:

OpenStudy (agent0smith):

(x^2 + 7x + 12)(x^2 + 3x + 5) = x^2*x^2 + x^2*3x + x^2*5 + 7x*x^2 + 7x*3x + 7x*5 + 12*x^2 + 12*3x + 12*5 simplify then combine like terms

OpenStudy (anonymous):

how long did it take you to type that!?

OpenStudy (agent0smith):

not long

OpenStudy (anonymous):

okay hahaha I'll do it myself. :)

OpenStudy (anonymous):

So it's gonna start out as x^4

OpenStudy (anonymous):

+21x^2

OpenStudy (anonymous):

+60 ?

OpenStudy (anonymous):

x^4 + 21x^2 + 60

OpenStudy (agent0smith):

You're missing a bunch of terms... try again. There should be an x^3 as well as an x

OpenStudy (anonymous):

x^4+ 3x^3 + 5x^2 + 10x + 17 ?

OpenStudy (agent0smith):

Numbers multiply. Exponents add. Don't mix that up.

OpenStudy (anonymous):

x^4 + 10x^3 + 38x^2 + 71x + 60

OpenStudy (agent0smith):

Yep :)

OpenStudy (anonymous):

yay. Can you help me with one more?

OpenStudy (anonymous):

Find the volume of the box. Use the formula V = lwh. http://static.k12.com/calms_media/media/1346000_1346500/1346479/1/344437dd3bde2263e29c5e7db43a9789331ccf8d/HS_A1G2_S2_155296.jpg

OpenStudy (agent0smith):

(x+1)(2x+1)(3x-2) Start with the left two brackets, expand those, ignore the 3rd set for now.

OpenStudy (anonymous):

Does it start with 6x^3

OpenStudy (agent0smith):

Yes

OpenStudy (anonymous):

6x^3 – 13x^2 – 3x – 2

OpenStudy (anonymous):

??

OpenStudy (agent0smith):

Nope...

OpenStudy (anonymous):

where did I go wrong?

OpenStudy (agent0smith):

I don't know, x+1)(2x+1)(3x-2) Start with the left two brackets so you can check that first.

OpenStudy (anonymous):

6x^3 – 13x^2 Does it start with that?

OpenStudy (agent0smith):

No, like i said, don't try to do it all at once. First two brackets first.

OpenStudy (anonymous):

okayyyyyy So do x * 2x ?

OpenStudy (anonymous):

6x^3

OpenStudy (anonymous):

6x3 – 2 ?

OpenStudy (agent0smith):

(x+1)(2x+1) do this first

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!