Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Shannon20150
Group Title
Factor 2x4  20x2  78.
2(x2 3)(x2 13) *****
2(x2+ 3)(x2 13)
2(x2 3)(x2+ 13)
I think is right ****
 one year ago
 one year ago
Shannon20150 Group Title
Factor 2x4  20x2  78. 2(x2 3)(x2 13) ***** 2(x2+ 3)(x2 13) 2(x2 3)(x2+ 13) I think is right ****
 one year ago
 one year ago

This Question is Closed

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
help me @FibonacciChick666
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
I would like you to please first try and check your answer before I try the problem. You are going to do this by using the FOIL method.
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
I did that's y I asked if its right
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
alrighty good, I'm working on it right now
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
okay lol
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
ok so only one of your answers is correct. let's go through the process together.
 one year ago

rosedewittbukater Group TitleBest ResponseYou've already chosen the best response.0
First factor out the 2 to get 2(x^410x^239) Replace any x^2 value with the variable a, so x^4 becomes a^2 because x^2 squared is x^4. You just do this to take the place of any x^2 s to make it easier, if that makes sense. So 2(a^210a39). Then you can do regular factoring. 3 and 13 multiply to become 39, and 313=10. So The equation would become \[2(a+13)(a3)\] Then change the a's back into x^2. So the answer is \[2(x ^{2}+3)(x ^{2}13)\] So the answer is the second one.
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
So the first thing that we want to do is pull out any like terms. What does each term in the expression have in common?
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
okay I need help again
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
ok, does the term (78) contain an \[x ^{2}\]
 one year ago

rosedewittbukater Group TitleBest ResponseYou've already chosen the best response.0
You can check your work by multiplying the factors back together using either the box method or FOIL. \[2(x ^{4}13x ^{2}+3x ^{2}39)\]Combine like terms to get \[2(x ^{4}10x ^{2}39)\]Then distribute the 2 \[2x ^{4}20x ^{2}78\]You know your answer is correct if it is the same as the original equation.
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
will u help me in another problem @rosedewittbukater
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
let's try a different approach. can you divide 78 by x^2 without leaving a remainder?
 one year ago

rosedewittbukater Group TitleBest ResponseYou've already chosen the best response.0
Sure
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
okay I posted it already
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
ok so what is 78 divided by x^2 ?
 one year ago

rosedewittbukater Group TitleBest ResponseYou've already chosen the best response.0
Where did you post it
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
is it 39
 one year ago

Shannon20150 Group TitleBest ResponseYou've already chosen the best response.0
on open questions
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
39 is 78 divided by only 2 but think about the other terms listed do they also divide by 2?
 one year ago

rosedewittbukater Group TitleBest ResponseYou've already chosen the best response.0
She's trying to ask what number or value can be divided out of every single part of the equation. There's no x^2 in 78 so the only common number that all of the numbers can be divided by is 2.
 one year ago

FibonacciChick666 Group TitleBest ResponseYou've already chosen the best response.1
let's try a slightly simplified example if you have the equation: \[2x+2\] What number is common to both terms?
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.