Quadratic function?HELPP

The x intercepts are the x values that make this function = 0

So....by inspection, we can see that these must be x = -1 and x = -8

Quadratic formula ?

Say you have " ax^2 + bx + c " or something similar... then the quadratic formula is:

negative b plus or minus the square root of b^2 - 4ac, all over 2a 

   -b ± √(b^2 - 4ac)

------(divided by)------

             2a

Quadratic formula ?

Say you have " ax^2 + bx + c " or something similar... then the quadratic formula is:

negative b plus or minus the square root of b^2 - 4ac, all over 2a 

   -b ± √(b^2 - 4ac)

------(divided by)------

             2a