A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
What are the real or imaginary solutions of the polynomial equation. 64x^3+27=0
Please help!!!! medal and fann!!!!
anonymous
 one year ago
What are the real or imaginary solutions of the polynomial equation. 64x^3+27=0 Please help!!!! medal and fann!!!!

This Question is Open

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do you know how to factor the sum of two cubes?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i skipped 3 units so idk how to do any of this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok i will show you \[a^3+b^3=(a+b)(a^2ab+b^2)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in this case you have \[64x^3+27=(4x)^3+3^3\] put \(a=4x,b=3\) and plug them in

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so 4x^3+3^3=(4x+3)(4x^24x*3+3^2) right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that what you meant by plug them in? cause that was a formula right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[4x^3+3^3=(4x+3)(4x^24x*3+3^2)\] is what you wrote but you need to square the 4 as well, should be \[4x^3+3^3=(4x+3)(16x^212x+9)\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh ok that makes more sense

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what do i do from there?

geerky42
 one year ago
Best ResponseYou've already chosen the best response.0\[0 = (4x)^3+3^3=(4x+3)(16x^212x+9)\] So either \(4x+3 = 0\) OR \(0 = 16x^212x+9\) So from here, you can easily solve first equation, then for second equation, just use quadratic formula.
Ask your own question
Sign UpFind more explanations on OpenStudy
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.