Find the Quadratic Equation -7 , -8

$- 7$ , $- 8$

Step 1

$x = - 7$ and $x = - 8$ are the two real distinct solutions for the quadratic equation, which means that $x + 7$ and $x + 8$ are the factors of the quadratic equation.

$(x + 7) (x + 8) = 0$

Step 2

Expand $(x + 7) (x + 8)$ using the FOIL Method.

Apply the distributive property.

$x (x + 8) + 7 (x + 8) = 0$

Apply the distributive property.

$x \cdot x + x \cdot 8 + 7 (x + 8) = 0$

Apply the distributive property.

$x \cdot x + x \cdot 8 + 7 x + 7 \cdot 8 = 0$

Step 3

Simplify and combine like terms.

Simplify each term.

Multiply $x$ by $x$ .

$x^{2} + x \cdot 8 + 7 x + 7 \cdot 8 = 0$

Move $8$ to the left of $x$ .

$x^{2} + 8 \cdot x + 7 x + 7 \cdot 8 = 0$

Multiply $7$ by $8$ .

$x^{2} + 8 x + 7 x + 56 = 0$

Add $8 x$ and $7 x$ .

$x^{2} + 15 x + 56 = 0$

Step 4

The standard quadratic equation using the given set of solutions ${- 7, - 8}$ is $y = x^{2} + 15 x + 56$ .

$y = x^{2} + 15 x + 56$

Step 5

Find the Quadratic Equation -7 , -8

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