Math

QuestionFind the simplified expression of g(x)f(x)g(x) - f(x), where f(x)=5x+3f(x) = 5x + 3 and g(x)=x2x+1g(x) = x^2 - x + 1. Then, determine the domain of the simplified expression.

Studdy Solution

STEP 1

1. The function f(x)=5x+3f(x) = 5x + 3 is a linear function.
2. The function g(x)=x2x+1g(x) = x^2 - x + 1 is a quadratic function.
3. The domain of a function is the set of all possible input values (x-values) for which the function is defined.
4. The domain of a polynomial function is all real numbers, unless otherwise restricted.

STEP 2

1. Perform the function operation g(x)f(x)g(x) - f(x).
2. Simplify the result of the function operation.
3. Determine the domain of the resulting function.

STEP 3

Perform the function operation g(x)f(x)g(x) - f(x).
g(x)f(x)=(x2x+1)(5x+3) g(x) - f(x) = (x^2 - x + 1) - (5x + 3)

STEP 4

Distribute the negative sign to the terms in f(x)f(x).
g(x)f(x)=x2x+15x3 g(x) - f(x) = x^2 - x + 1 - 5x - 3

STEP 5

Combine like terms.
g(x)f(x)=x26x2 g(x) - f(x) = x^2 - 6x - 2

STEP 6

The simplified result of the function operation is:
g(x)f(x)=x26x2 g(x) - f(x) = x^2 - 6x - 2

STEP 7

Determine the domain of the resulting function.
Since the resulting function g(x)f(x)=x26x2g(x) - f(x) = x^2 - 6x - 2 is a polynomial, its domain is all real numbers.
Therefore, the domain of g(x)f(x)g(x) - f(x) is R\mathbb{R}, which means all real numbers.
The simplified expression for g(x)f(x)g(x) - f(x) is x26x2x^2 - 6x - 2, and the domain is all real numbers.

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