When you multiply two integers, or in fact any two numbers, you are finding the product of those two numbers;
So finding the product is done through multiplication.
we are given

Firstly ,we can find equation in vertex form
so, we will complete x square



now, we can compare it with vertex form of equation

we can find h and k

so, vertex is
.............Answer
I do not know the answer but download the app called Photomath and it will give you the answer
Does the equation have a photo??