Finite Math Examples

$x = - 5$ , $2 x^{2} - 3 x - 7$

Step 1

Replace the variable $x$ with $- 5$ in the expression.

$2 {(- 5)}^{2} - 3 \cdot - 5 - 7$

Step 2

Simplify each term.

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Step 2.1

Raise $- 5$ to the power of $2$ .

$2 \cdot 25 - 3 \cdot - 5 - 7$

Step 2.2

Multiply $2$ by $25$ .

$50 - 3 \cdot - 5 - 7$

Step 2.3

Multiply $- 3$ by $- 5$ .

$50 + 15 - 7$

Step 3

Simplify by adding and subtracting.

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Step 3.1

Add $50$ and $15$ .

$65 - 7$

Step 3.2

Subtract $7$ from $65$ .

$58$