Kindra M.

asked • 09/30/16

for what value of c will the funciton x^6+9x^4+26x^2 +C have real roots?

I have the answer of -2, I just don't know how they got it.

2 Answers By Expert Tutors

By:

Peter G. answered • 09/30/16

Tutor
4.9 (43)

Success in math and English; Math/Logic Master's; 99th-percentile

Kindra M.

No, I have the answer of -2, I just don't know how they got it.
Report

10/01/16

Peter G.

A real root is when the graph of the function crosses the x axis. I said in the second paragraph that -2 is an answer, just not the only one. However, we don't know what you're being taught in the course, so we don't know whether to use calculus or a graphing calculator or what.
 
I would recommend cutting and pasting your polynomial into the graphing calculator at desmos.com. Then try using -2 for C, and you will see that it crosses the x axis . So does -1, -3, -2.5, etc.
Report

10/01/16

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.