Math Problem Statement
Factor the polynomial as the product of three binomials. Note: Try using factor theorem for guessing some of the factors. [x^3 -8x^2 +17x -10=]
Solution
To factor the given cubic polynomial , we can use the Factor Theorem to find potential factors.
Step 1: Use the Factor Theorem
The Factor Theorem states that if is a root of the polynomial, then is a factor. Let's check for simple integer roots by substituting values of into the polynomial .
We'll test small integers like , which are reasonable guesses based on the constant term .
Test :
So, is a root, and therefore is a factor.
Step 2: Perform synthetic division
Now that we know one factor is , we can divide the cubic polynomial by to find the quotient.
Using synthetic division:
1 & 1 & -8 & 17 & -10 \\ & & 1 & -7 & 10 \\ \hline & 1 & -7 & 10 & 0 \end{array}$$ The quotient is $$x^2 - 7x + 10$$, so the polynomial becomes: $$x^3 - 8x^2 + 17x - 10 = (x - 1)(x^2 - 7x + 10)$$ ### Step 3: Factor the quadratic Next, we factor the quadratic $$x^2 - 7x + 10$$. We need two numbers that multiply to $$10$$ and add to $$-7$$. These numbers are $$-5$$ and $$-2$$. Thus: $$x^2 - 7x + 10 = (x - 5)(x - 2)$$ ### Step 4: Write the final factored form Now, combining everything: $$x^3 - 8x^2 + 17x - 10 = (x - 1)(x - 5)(x - 2)$$ This is the fully factored form of the polynomial. Would you like more details on any step or have any other questions? Here are 5 related questions: 1. How does the Factor Theorem help in finding the factors of polynomials? 2. What are the other methods for factoring a cubic polynomial? 3. Can synthetic division be used with non-integer roots? 4. How do you check if a given factorization is correct? 5. What happens if a cubic polynomial has complex roots? **Tip**: Always check for simple integer roots first, as they can significantly speed up the factoring process.Ask a new question for Free
By Image
Drop file here or Click Here to upload
Math Problem Analysis
Mathematical Concepts
Algebra
Polynomial Factorization
Cubic Equations
Formulas
Synthetic division
Quadratic factorization
Theorems
Factor Theorem
Suitable Grade Level
Grades 10-12
Related Recommendation
Factor of Polynomial f(x) = x^3 - 8x^2 + 17x - 10
Factorizing a Cubic Polynomial 3x^3 + 17x^2 + 22x + 8 Using Factor Theorem
Factorization of x^3 + x^2 - 8x - 12 into Linear Factors
How to Factor the Cubic Polynomial x^3 + x^2 - 8x - 12
Factorize the cubic polynomial x^3 + 5x^2 + 2x - 8 using Rational Root Theorem and Synthetic Division