How the heck!?

Fill in the missing term so that the quadratic equation has a graph that opens up, with a vertex of
(– 3, – 25), and x intercepts at x = -8 and x = 2.

How do they expect me to do that!??

Question

How the heck!?

Fill in the missing term so that the quadratic equation has a graph that opens up, with a vertex of 
(– 3, – 25), and x intercepts at x = -8 and x = 2.

How do they expect me to do that!??

anonymous · Answer

The term is: y = x2 + 6x −  ___

The final term on the end is missing

primeralph · Answer

solved this for someone already here. Simply expand (x+8)(x-2)

anonymous · Answer

x^2 -2x + 8x - 16
x^2 + 6x - 16?

primeralph · Answer

so compare that with the given one.

anonymous · Answer

What do you mean?

anonymous · Answer

Isn't the last term -16?

primeralph · Answer

The negative is already included in the question..