Simplify .

Apply the distributive property.

Simplify the expression.

Multiply by .

Move to the left of .

Move to the left side of the equation by subtracting it from both sides.

Once the quadratic is in standard form, the values of , , and can be found.

Use the standard form of the equation to find , , and for this quadratic.

, ,

Find a,b,c x(x+8)=9