Question

Find the depressed equation of f(x) = x4 – x3 + 7x2 – 9x – 18.

Answer 1

What is a depressed equation?

Answer 2

A depressed equation is the result when a function is divided by one of its roots or zeros.

The depressed equation is f(x) = 1x2 + 7x + 6.

Basically when it breaks done into a quadratic form..

Answer 3

http://www.wolframalpha.com/input/?i=x4+%E2%80%93+x3+%2B+7x2+%E2%80%93+9x+%E2%80%93+18
(x-2)(x+1)(x^2+9)

Answer 4

usually, depressed equations: Q(x) = 0 are resultant from dividing in a factor (x-r) where r is an integer. was one given to use in this question?

Answer 5

Nope I have to find everything through the rational number theorem and Descartes' Rule of Signs

Answer 6

*rational root theorem