3 x 2 6x + 5x = 0

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
Question

Solve for X

 

The equation provided is a cubic polynomial equation:

\[ x^3 - 6x^2 + 5x = 0 \]

This is a standard form of a cubic equation where:

- The highest degree term is \( x^3 \).
- The equation is set equal to zero, indicating solutions for \( x \).

### Solving the Equation

To solve for \( x \), we can factor the equation:

1. Factor out the common term \( x \):
   \[ x(x^2 - 6x + 5) = 0 \]

2. Solve for \( x \) by setting each factor equal to zero:
   - \( x = 0 \)
   - \( x^2 - 6x + 5 = 0 \)

3. Solve the quadratic equation \( x^2 - 6x + 5 = 0 \) using the quadratic formula, \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \), where \( a = 1 \), \( b = -6 \), and \( c = 5 \).

4. Calculate the discriminant:
   \[ b^2 - 4ac = (-6)^2 - 4 \cdot 1 \cdot 5 = 36 - 20 = 16 \]

5. Find the roots:
   \[ x = \frac{6 \pm \sqrt{16}}{2} \]
   \[ x = \frac{6 \pm 4}{2} \]

   - \( x = \frac{6 + 4}{2} = 5 \)
   - \( x = \frac{6 - 4}{2} = 1 \)

### Solutions

The solutions to the equation are:
- \( x = 0 \)
- \( x = 1 \)
- \( x = 5 \)

The roots of the equation indicate the points where the curve \( y = x^3 - 6x^2 + 5x \) intersects the \( x \)-axis.
Transcribed Image Text:The equation provided is a cubic polynomial equation: \[ x^3 - 6x^2 + 5x = 0 \] This is a standard form of a cubic equation where: - The highest degree term is \( x^3 \). - The equation is set equal to zero, indicating solutions for \( x \). ### Solving the Equation To solve for \( x \), we can factor the equation: 1. Factor out the common term \( x \): \[ x(x^2 - 6x + 5) = 0 \] 2. Solve for \( x \) by setting each factor equal to zero: - \( x = 0 \) - \( x^2 - 6x + 5 = 0 \) 3. Solve the quadratic equation \( x^2 - 6x + 5 = 0 \) using the quadratic formula, \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \), where \( a = 1 \), \( b = -6 \), and \( c = 5 \). 4. Calculate the discriminant: \[ b^2 - 4ac = (-6)^2 - 4 \cdot 1 \cdot 5 = 36 - 20 = 16 \] 5. Find the roots: \[ x = \frac{6 \pm \sqrt{16}}{2} \] \[ x = \frac{6 \pm 4}{2} \] - \( x = \frac{6 + 4}{2} = 5 \) - \( x = \frac{6 - 4}{2} = 1 \) ### Solutions The solutions to the equation are: - \( x = 0 \) - \( x = 1 \) - \( x = 5 \) The roots of the equation indicate the points where the curve \( y = x^3 - 6x^2 + 5x \) intersects the \( x \)-axis.
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