Finding the remainding zeros of a polynomial function

Forums: Imaginary Zeros, Finding Zeros, Real Zeros, Functions, Polynomial
Email this Topic • Print this Page

Hey, I got some homework problems which I have to solve 'til tuesday (better monday). But I don't understand at all what I have to do. Maybe one of you guys could solve an example for me and explain how it works so I can do the rest. I'm gonna list a few examples from our book of what we have to do down here:
1. Find the remaining zeros of f(x)=x^4 -2x^3 +5x^2 +10x-50 when 1+3i is a zero
2. Determine all the zeros: f(x)= 2x^3 -3x^2 -4x+6
f(x)= x^3+2x^2 -5x-6

Topic Stats
Top Replies
Link to this Topic

Type: Question • Score: 0 • Views: 752 • Replies: 1

No top replies

@momo3007,

For the first one, 1 - 3i is also a zero.

Come up with a quadratic that has 1+3i and 1-3i as zeroes and that will be a quadratic factor of f.

For the second one, just guess one of the roots. Try all the divisors of 6.
(You may have to try fractions with small denominators.)

0 Replies

Forums
» Finding the remainding zeros of a polynomial function

Read Question
Reply to All

Finding the remainding zeros of a polynomial function

Quick Links

My Account

able2know