Algebra 2: Graphing Polynomials Flashcards
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Questions and Answers

What is the equation represented by the polynomial?

y = x³ + 2

Does the graph of y = x⁴ more closely resemble which of the following?

  • y = x³
  • y = x² (correct)

    • What is the equation represented by the polynomial?

    y = x³ + 2x² − x − 2

    What is the equation represented by the polynomial?

    <p>y = x³ − 4</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = (x − 3)³</p> Signup and view all the answers

    Unlike quadratics, cubics must have at least ______ real root(s).

    <p>one</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= - x(x+1)²(x-3)².

    <p>f(x) = - x(x+1)²(x-3)²</p> Signup and view all the answers

    What is the expanded form of (x+2+3i)(x+2-3i)?

    <p>x²+4x+13</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= x²(x+1)(x-3)³.

    <p>f(x) = x²(x+1)(x-3)³</p> Signup and view all the answers

    Does the graph of y = x⁵ more closely resemble which of the following?

    <p>y = x³</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = (x − 3)³ + 5</p> Signup and view all the answers

    What is the expanded form of (x+4)(x-4)(x+4i)(x-4i)?

    <p>x⁴-16</p> Signup and view all the answers

    After multiplying the factors, what is the equation for the function y = x⁴ − 10x³ + 35x² − 50x + 24?

    <p>y = x⁴ − 10x³ + 35x² − 50x + 24</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = x³ + (5/2)</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= - x(x+1)(x-3)².

    <p>f(x) = - x(x+1)(x-3)²</p> Signup and view all the answers

    How many complex roots does the function y = 3x³ + 2x² - x + 1 have?

    <p>three</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = -x³</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= x(x+1)(x-3).

    <p>f(x) = x(x+1)(x-3)</p> Signup and view all the answers

    What is the expanded form of (2x-3)(3x+5)?

    <p>6x²+x-15</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= - x²(x+1)(x-3)³.

    <p>f(x) = - x²(x+1)(x-3)³</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = x³ − 4x</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= - x(x+1)(x-3).

    <p>f(x) = - x(x+1)(x-3)</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= x(x+1)(x-3)².

    <p>f(x) = x(x+1)(x-3)²</p> Signup and view all the answers

    What is the expanded form of (x+3)(x+4)?

    <p>x²+7x+12</p> Signup and view all the answers

    What is the expanded form of (x+4)(x+2)?

    <p>x²+6x+8</p> Signup and view all the answers

    Write a possible equation for the graph represented by f(x)= x(x+1)²(x-3)².

    <p>f(x) = x(x+1)²(x-3)²</p> Signup and view all the answers

    What is the equation represented by the polynomial?

    <p>y = x³</p> Signup and view all the answers

    What is the expanded form of (x-3)(x+2)?

    <p>x²-x-6</p> Signup and view all the answers

    What is the expanded form of (x+3)(x-3)?

    <p>x²-9</p> Signup and view all the answers

    What is the expanded form of (x-10)(x-2)?

    <p>x²-12x+20</p> Signup and view all the answers

    Study Notes

    Polynomial Functions and Equations

    • y = x³ + 2 represents a cubic function with a vertical shift of 2 units.
    • y = x² characterizes a quadratic function; a comparison with y = x⁴ indicates that y = x⁴ resembles y = x² more closely due to both being even-degree polynomials.
    • y = x³ + 2x² − x − 2 is a cubic function that can be factored to find its roots.
    • y = x³ − 4 represents a cubic function that has a real root that can be found using the factor theorem.

    Polynomial Roots and Behavior

    • A cubic function, such as y = (x−3)³, must have at least one real root due to its odd degree.
    • Complex roots can appear in conjugate pairs; for instance, (x + 2 ± 3i) expands to x² + 4x + 13.
    • The function f(x)= - x(x+1)²(x-3)² indicates there could be multiple roots at x = -1 and x = 3 due to the squared terms.

    Graph Transformations and Characteristics

    • The transformation of y = (x−3)³ + 5 shifts the graph of y = (x−3)³ upwards by 5 units.
    • Higher degree polynomials (e.g., y = x⁵) resemble cubic functions in terms of end behavior, especially compared to y = x².
    • The function f(x)= x(x+1)(x-3) indicates the roots are at x = 0, x = -1, and x = 3.

    Factoring and Expanding

    • The product (x + 4)(x - 4)(x + 4i)(x - 4i) simplifies to x⁴ - 16, showcasing the difference of squares and complex roots.
    • Polynomial expressions need to be expanded to find standard form, as with y = x⁴ − 10x³ + 35x² − 50x + 24 from its factors.
    • Products can represent basic polynomial forms, such as (2x-3)(3x+5) which simplifies to 6x² + x - 15.

    Analyzing Polynomial Degrees and Roots

    • A cubic polynomial such as y = x³ will have three complex roots, counted with multiplicity from its degree.
    • The function f(x) = - x²(x + 1)(x - 3)³ indicates the polynomial opens downward and has multiple turning points due to the squared factors.

    Miscellaneous Polynomial Facts

    • Equations like f(x) = x(x + 1)²(x - 3)² are useful for determining the multiplicity of roots when graphing.
    • Examples of combining factors: (x + 3)(x + 4) results in x² + 7x + 12, indicating the method for expansion in polynomial expressions.
    • Distinct factor pairs such as (x - 10)(x - 2) result in expanding to x² - 12x + 20, providing foundations in understanding polynomial transformations.

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    Test your understanding of graphing polynomials with this set of flashcards. Each card explores key polynomial equations and their characteristics, such as multiplicity and factoring concepts. Perfect for Algebra 2 students looking to reinforce their learning.

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