Solve each rational inequality in Exercises 43–60 and graph the solution set on a real number line. Express each solution set in interval notation. (x+4)(x−1)/(x+2)≤0
Ch. 3 - Polynomial and Rational Functions

4장, 문제 53
Write a polynomial that represents the length of each rectangle. Transcription: The area of the rectangle is 0.5x3 - 0.3x2 + 0.22x + 0.06 square units and its width is x + 0.2 units

검증된 단계별 안내1
Recall the formula for the area of a rectangle: \(\text{Area} = \text{Length} \times \text{Width}\).
Given the area as \(0.5x^{3} - 0.3x^{2} + 0.22x + 0.06\) and the width as \(x + 0.2\), set up the equation: \(0.5x^{3} - 0.3x^{2} + 0.22x + 0.06 = \text{Length} \times (x + 0.2)\).
To find the length, divide the area polynomial by the width polynomial: \(\text{Length} = \frac{0.5x^{3} - 0.3x^{2} + 0.22x + 0.06}{x + 0.2}\).
Perform polynomial division (either long division or synthetic division) to divide \(0.5x^{3} - 0.3x^{2} + 0.22x + 0.06\) by \(x + 0.2\).
The quotient from this division will be the polynomial expression representing the length of the rectangle.

비슷한 문제에 대한 검증된 영상 답변:
이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
5m도움이 되었나요?
주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Polynomial Expressions
A polynomial is an algebraic expression consisting of terms with variables raised to non-negative integer powers and coefficients. Understanding how to manipulate polynomials, including addition, subtraction, multiplication, and division, is essential for working with expressions like the given area and width.
추천 영상:
Introduction to Algebraic Expressions
Area of a Rectangle
The area of a rectangle is found by multiplying its length by its width. Given the area and one dimension (width), you can find the other dimension (length) by dividing the area polynomial by the width polynomial.
추천 영상:
Systems of Inequalities
Polynomial Division
Polynomial division is the process of dividing one polynomial by another, similar to numerical long division. It is used here to find the length polynomial by dividing the area polynomial by the width polynomial.
추천 영상:
Introduction to Polynomials
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