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What is $(f * g)(x)$ ? $\newline$ $f(x) = x^2 + x$ $\newline$ $g(x) = 5x$ $\newline$ Write your answer as a polynomial or a rational function in simplest form. $\newline$ ______

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Add and subtract functions

Full solution

Q. What is

(f * g)(x)

?

\newline

f(x) = x^2 + x

\newline

g(x) = 5x

\newline

Write your answer as a polynomial or a rational function in simplest form.

\newline

______

Identify Formula: Identify the formula for $(f * g)(x)$ . $(f * g)(x)$ is the product of $f(x)$ and $g(x)$ . $(f * g)(x) = f(x) * g(x)$
Find Function: We have: $\newline$ $f(x) = x^2 + x$ $\newline$ $g(x) = 5x$ $\newline$ Which function represents $(f * g)(x)$ ? $\newline$ $(f * g)(x) = f(x) * g(x)$ $\newline$ $(f * g)(x) = (x^2 + x) * 5x$
Distribute Terms: Distribute $5x$ across the terms in the parentheses. $\newline$ $(f * g)(x) = x^2 * 5x + x * 5x$ $\newline$ $(f * g)(x) = 5x^3 + 5x^2$
Simplify Polynomial: Express your answer as a simplified polynomial. $\newline$ The polynomial is already in simplest form. $\newline$ $(f \cdot g)(x) = 5x^3 + 5x^2$

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