Solution: How many positive real solutions are there in the polynomial

How many positive real solutions are there in the polynomial: x^4 - 4x^3 + 7x^2 - 6x - 18 = 0. Find the positive real solutions of the polynomial.

How many positive real solutions are there in the polynomial

Problem Statement:

How many positive real solutions are there in the polynomial: x4 - 4x3 + 7x2 - 6x - 18 = 0.

Problem Answer:

There are three sign changes, so three or one positive real solutions.

Solution:

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