A community for students.
Here's the question you clicked on:
 0 viewing
a123
 4 years ago
(x+3)^2  (3x1)^2 = x^3 + 4?
i've tried this three times and I still get the wrong answer!
a123
 4 years ago
(x+3)^2  (3x1)^2 = x^3 + 4? i've tried this three times and I still get the wrong answer!

This Question is Closed

a123
 4 years ago
Best ResponseYou've already chosen the best response.0\[(x+3)^2  (3x  1)^2 = x^3 + 4\]

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1unless you know the cubic formula, your best bet is to use a graphing calculator to find the approximate solutions.

a123
 4 years ago
Best ResponseYou've already chosen the best response.0we're not allowed to use a calculator. the answer is supposed to come out to be  2/3

a123
 4 years ago
Best ResponseYou've already chosen the best response.0but I don't know how to get there

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1ok so there's a typo somewhere in the problem then, my guess is that x^3 is one of the typos

a123
 4 years ago
Best ResponseYou've already chosen the best response.0wait, I made a mistake typing out the problem. it's actually \[(x+3)^3\] as the first one

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1oh ok thx, one sec

a123
 4 years ago
Best ResponseYou've already chosen the best response.0so \[(x+3)^3  (3x  1)^2 = x^3 + 4\]

jim_thompson5910
 4 years ago
Best ResponseYou've already chosen the best response.1\[\large (x+3)^3 (3x1)^2 = x^3 + 4\] \[\large x^3+9x^2+27x+27 (9x^26x+1) = x^3 + 4\] \[\large x^3+9x^2+27x+27 9x^2+6x1 = x^3 + 4\] \[\large x^3+9x^2+27x+27 9x^2+6x1  x^3  4=0\] \[\large 33x+22=0\] \[\large 33x=22\] \[\large x=\frac{22}{33}\] \[\large x=\frac{2}{3}\]

a123
 4 years ago
Best ResponseYou've already chosen the best response.0thank you! i see exactly where I went wrong.
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.