How do you convert p(x) = -8x^2 - 64x to vertex form?

I know the answer is p(x) = -8(x + 4)^2 + 128, but I'm unaware of the steps taken to get to that stage.

Any help is appreciated, thanks!

Step-by-step explanation:

Given,

Take -8 factor common,

which can be written as

Add and subtract by 16 inside bracket,

.there can be infinite values of m and n that can satisfy the above equation. for each value of m of m or n. there maybe infinite sets of solution for the above

step-by-step explanation:

let's fu(!

step-by-step explanation: