Practice Rational Root Theorem (4.1) - Cubic Functions - IB 10 Mathematics – Group 5, Algebra
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Rational Root Theorem

Practice - Rational Root Theorem

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Practice Questions

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Question 1 Easy

List the possible rational roots for the polynomial \( f(x) = x^3 - 4x^2 + 4x - 1 \).

💡 Hint: Use the factors of -1 divided by the factors of 1.

Question 2 Easy

Identify the factors of 3.

💡 Hint: Consider numbers that can multiply to give 3.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What does the Rational Root Theorem help you determine?

The degree of the polynomial
Possible rational roots
Complex roots
End behavior of graphs

💡 Hint: Think about what we can find using factors.

Question 2

True or False: The Rational Root Theorem can only find integer roots.

True
False

💡 Hint: Consider the structure of rational numbers.

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Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

For the cubic polynomial \( f(x) = 5x^3 - 4x^2 + 3x - 2 \), find all possible rational roots, and confirm any that work using synthetic division.

💡 Hint: Factorize -2 and 5 for potential roots.

Challenge 2 Hard

Using the Rational Root Theorem, find possible rational roots for \( f(x) = 6x^3 + x^2 - 8x - 4 \), and explain how to confirm them.

💡 Hint: Focus on factors of 4 and 6.

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