Simplify (x^2 + 7x + 12)(x^2 + 3x + 5)
@agent0smith @amoodarya @chucky00
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.
Right I get that I just don't wanna do ittttttttttttttttt. D:
(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
how long did it take you to type that!?
not long
okay hahaha I'll do it myself. :)
So it's gonna start out as x^4
+21x^2
+60 ?
x^4 + 21x^2 + 60
You're missing a bunch of terms... try again. There should be an x^3 as well as an x
x^4+ 3x^3 + 5x^2 + 10x + 17 ?
Numbers multiply. Exponents add. Don't mix that up.
x^4 + 10x^3 + 38x^2 + 71x + 60
Yep :)
yay. Can you help me with one more?
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
(x+1)(2x+1)(3x-2) Start with the left two brackets, expand those, ignore the 3rd set for now.
Does it start with 6x^3
Yes
6x^3 – 13x^2 – 3x – 2
??
Nope...
where did I go wrong?
I don't know, x+1)(2x+1)(3x-2) Start with the left two brackets so you can check that first.
6x^3 – 13x^2 Does it start with that?
No, like i said, don't try to do it all at once. First two brackets first.
okayyyyyy So do x * 2x ?
6x^3
6x3 – 2 ?
(x+1)(2x+1) do this first
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