Determine if Odd, Even, or Neither f(x)=x^2|x|+9

$f (x) = x^{2} | x | + 9$

Find $f (- x)$ .

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Find $f (- x)$ by substituting $- x$ for all occurrence of $x$ in $f (x)$ .

$f (- x) = {(- x)}^{2} | - x | + 9$

Simplify each term.

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Apply the product rule to $- x$ .

$f (- x) = {(- 1)}^{2} x^{2} | - x | + 9$

Raise $- 1$ to the power of $2$ .

$f (- x) = 1 x^{2} | - x | + 9$

Multiply $x^{2}$ by $1$ .

$f (- x) = x^{2} | - x | + 9$

Make $- x$ positive.

$f (- x) = x^{2} | x | + 9$

A function is even if $f (- x) = f (x)$ .

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Check if $f (- x) = f (x)$ .

$x^{2} | x | + 9 = x^{2} | x | + 9$

Since $x^{2} | x | + 9 = x^{2} | x | + 9$ , the function is even.

The function is even

Determine if Odd, Even, or Neither f(x)=x^2|x|+9

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