Algebra Examples

$f (x) = - x$ $y (x) = - x$

Step 1

Set up the composite result function.

$f (y (x))$

Step 2

Evaluate $f (- x)$ by substituting in the value of $y$ into $f$ .

$f (- x) = - (- x)$

Step 3

Multiply $- (- x)$ .

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Step 3.1

Multiply $- 1$ by $- 1$ .

$f (- x) = 1 x$

Step 3.2

Multiply $x$ by $1$ .

$f (- x) = x$