Algebra Unit 6 & 7 Review Flashcards
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Questions and Answers

What is the result of ((6x^2 - 2x - 28) / (2x + 4))?

3x - 7

Expand (3x^2(4x^2 - 5x + 7)).

12x^4 - 15x^3 + 21x^2

What is the result of ((4x - 5)(2x^2 + 3x - 6))?

8x^3 + 2x^2 - 39x + 30

A 9th degree polynomial with a negative leading coefficient rises as (x \to -\infty).

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

Identify the degree, number of terms, and name of the polynomial: (3x^4 + x^2 - 5x + 9).

<p>Degree = 4, Number of terms = 4, Name = 4th degree polynomial</p> Signup and view all the answers

A 10th degree polynomial with a negative leading coefficient falls as (x \to -\infty).

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

What is the result of ((5x - 2 + y) - (-3y + 5x + 2))?

<p>10x - 2y</p> Signup and view all the answers

A 3rd degree polynomial with a positive leading coefficient rises as (x \to -\infty).

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

What is the result of (-4x + 7 - (5x - 3))?

<p>-4x + 10</p> Signup and view all the answers

A 6th degree polynomial with a positive leading coefficient rises as (x \to -\infty).

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

Factor (x^2 + 36).

<p>(x - 6i)(x + 6i)</p> Signup and view all the answers

Factor (x^2 - 10x + 24) using the quadratic formula.

<p>(x - 6)(x - 4)</p> Signup and view all the answers

Factor (x^2 - 81).

<p>(x - 9)(x + 9)</p> Signup and view all the answers

Factor the polynomial (x^4 - 1 = 0).

<p>±1, ±i</p> Signup and view all the answers

What is a polynomial that has roots 4 and 5i?

<p>x^3 - 4x^2 + 25x - 100</p> Signup and view all the answers

Factor (x^2 + 3).

<p>(x - i√3)(x + i√3)</p> Signup and view all the answers

Identify the degree, number of terms, and name of the polynomial: (6y^5 + 9y^2 - 3y + 8).

<p>Degree = 5, Number of terms = 4, Name = 5th degree polynomial</p> Signup and view all the answers

Factor (x^2 - 1).

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

Identify the degree, number of terms, and name of the polynomial: (5y - 10).

<p>Degree = 1, Number of terms = 2, Name = 1st degree binomial</p> Signup and view all the answers

Identify the degree, number of terms, and name of the polynomial: (7x^3 + 5^2 + 1).

<p>Degree = 3, Number of terms = 3, Name = 3rd degree trinomial</p> Signup and view all the answers

Study Notes

Polynomial Operations

  • Simplifying the expression ((6x^2 - 2x - 28) / (2x + 4)) yields (3x - 7).
  • The expression (3x^2(4x^2 - 5x + 7)) expands to (12x^4 - 15x^3 + 21x^2).
  • The product of ((4x - 5)(2x^2 + 3x - 6)) results in (8x^3 + 2x^2 - 39x + 30).

Polynomial Characteristics

  • A polynomial of degree 9 with a negative leading coefficient rises as (x \to -\infty) and falls as (x \to \infty).
  • The polynomial (3x^4 + x^2 - 5x + 9) has degree 4, consists of 4 terms, and is classified as a 4th degree polynomial.
  • A 10th degree polynomial with a negative leading coefficient falls for both (x \to -\infty) and (x \to \infty).

Simplifying Expressions

  • The expression ((5x - 2 + y) - (-3y + 5x + 2)) simplifies to (10x - 2y).
  • The simplification of (-4x + 7 - (5x - 3)) results in (-4x + 10).

Behavior of Polynomials

  • A 3rd degree polynomial with a positive leading coefficient falls as (x \to -\infty) and rises as (x \to \infty).
  • A 6th degree polynomial with a positive leading coefficient rises for both (x \to -\infty) and (x \to \infty).

Factoring Polynomials

  • The polynomial (x^2 + 36) can be factored as ((x - 6i)(x + 6i)).
  • The quadratic (x^2 - 10x + 24) factors to ((x - 6)(x - 4)).
  • The expression (x^2 - 81) can be factored into ((x - 9)(x + 9)).

Finding Roots

  • The equation (x^4 - 1 = 0) has roots of (±1, ±i).
  • Given roots (4) and (5i), constructing a polynomial yields (x^3 - 4x^2 + 25x - 100).
  • For (x^2 + 3), the roots are represented as ((x - i\sqrt{3})(x + i\sqrt{3})).

Degrees and Classifications

  • The polynomial (6y^5 + 9y^2 - 3y + 8) has degree 5, includes 4 terms, and is categorized as a 5th degree polynomial.
  • The polynomial (x^2 - 1) factors to ((x - \sqrt{1})(x + \sqrt{1})).
  • The polynomial (5y - 10) has degree 1, consists of 2 terms, and is called a 1st degree binomial.
  • The polynomial (7x^3 + 5^2 + 1) has degree 3, includes 3 terms, and is defined as a 3rd degree trinomial.

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Prepare for your Algebra review with these flashcards focusing on Units 6 and 7. Each card presents a polynomial function and its properties, helping you understand the concepts of degrees, leading coefficients, and polynomial expressions. Perfect for students looking to strengthen their algebra skills.

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