Algebra Examples

$9 x - 2 y^{2}$ ; $x = 3$ , $y = - 4$

Step 1

Replace the variable $x$ with $3$ in the expression.

$9 (3) - 2 y^{2}$

Step 2

Replace the variable $y$ with $- 4$ in the expression.

$9 (3) - 2 {(- 4)}^{2}$

Step 3

Simplify each term.

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Step 3.1

Multiply $9$ by $3$ .

$27 - 2 {(- 4)}^{2}$

Step 3.2

Raise $- 4$ to the power of $2$ .

$27 - 2 \cdot 16$

Step 3.3

Multiply $- 2$ by $16$ .

$27 - 32$

Step 4

Subtract $32$ from $27$ .

$- 5$