Find Three Ordered Pair Solutions r(x)=-x^2+8x-15

$r (x) = - x^{2} + 8 x - 15$

Step 1

Write $r (x) = - x^{2} + 8 x - 15$ as an equation.

$y = - x^{2} + 8 x - 15$

Step 2

Choose any value for $x$ that is in the domain to plug into the equation.

Step 3

Choose $0$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 0^{2} + 8 (0) - 15$

Remove parentheses.

$y = - {(0)}^{2} + 8 (0) - 15$

Simplify $- {(0)}^{2} + 8 (0) - 15$ .

Simplify each term.

Raising $0$ to any positive power yields $0$ .

$y = - 0 + 8 (0) - 15$

Multiply $- 1$ by $0$ .

$y = 0 + 8 (0) - 15$

Multiply $8$ by $0$ .

$y = 0 + 0 - 15$

Simplify by adding and subtracting.

Add $0$ and $0$ .

$y = 0 - 15$

Subtract $15$ from $0$ .

$y = - 15$

Use the $x$ and $y$ values to form the ordered pair.

$(0, - 15)$

Step 4

Choose $1$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 1^{2} + 8 (1) - 15$

Remove parentheses.

$y = - {(1)}^{2} + 8 (1) - 15$

Simplify $- {(1)}^{2} + 8 (1) - 15$ .

Simplify each term.

One to any power is one.

$y = - 1 \cdot 1 + 8 (1) - 15$

Multiply $- 1$ by $1$ .

$y = - 1 + 8 (1) - 15$

Multiply $8$ by $1$ .

$y = - 1 + 8 - 15$

Simplify by adding and subtracting.

Add $- 1$ and $8$ .

$y = 7 - 15$

Subtract $15$ from $7$ .

$y = - 8$

Use the $x$ and $y$ values to form the ordered pair.

$(1, - 8)$

Step 5

Choose $2$ to substitute in for $x$ to find the ordered pair.

Remove parentheses.

$y = - 2^{2} + 8 (2) - 15$

Remove parentheses.

$y = - {(2)}^{2} + 8 (2) - 15$

Simplify $- {(2)}^{2} + 8 (2) - 15$ .

Simplify each term.

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

$y = - 1 \cdot 4 + 8 (2) - 15$

Multiply $- 1$ by $4$ .

$y = - 4 + 8 (2) - 15$

Multiply $8$ by $2$ .

$y = - 4 + 16 - 15$

Simplify by adding and subtracting.

Add $- 4$ and $16$ .

$y = 12 - 15$

Subtract $15$ from $12$ .

$y = - 3$

Use the $x$ and $y$ values to form the ordered pair.

$(2, - 3)$

Step 6

These are three possible solutions to the equation.

$(0, - 15), (1, - 8), (2, - 3)$

Step 7

Find Three Ordered Pair Solutions r(x)=-x^2+8x-15

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