In Exercises 11–26, determine whether each equation defines y as a function of x. xy - 5y =1
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Problem 30
Textbook Question
In Exercises 27–38, evaluate each function at the given values of the independent variable and simplify. g(x) = x² - 10x - 3b. g(x+2)
Verified step by step guidance1
Substitute \( x + 2 \) into the function \( g(x) = x^2 - 10x - 3 \) to get \( g(x+2) = (x+2)^2 - 10(x+2) - 3 \).
Expand \( (x+2)^2 \) to get \( x^2 + 4x + 4 \).
Distribute \( -10 \) across \( (x+2) \) to get \( -10x - 20 \).
Combine all the terms: \( x^2 + 4x + 4 - 10x - 20 - 3 \).
Simplify the expression by combining like terms.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Function Evaluation
Function evaluation involves substituting a specific value for the independent variable in a function. In this case, we need to replace 'x' in the function g(x) = x² - 10x - 3 with (x + 2). This process allows us to determine the output of the function for that particular input.
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Algebraic Simplification
Algebraic simplification is the process of reducing an expression to its simplest form. After substituting (x + 2) into the function, we will expand the resulting expression and combine like terms to simplify it. This step is crucial for making the expression easier to work with and understand.
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Quadratic Functions
A quadratic function is a polynomial function of degree two, typically expressed in the form f(x) = ax² + bx + c. The function g(x) = x² - 10x - 3 is a quadratic function, and understanding its properties, such as its graph and vertex, can provide insights into its behavior and the significance of its outputs.
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