Converting to vertex form is actually pretty simple so I think you might find something to help you out here. :)
https://mathbitsnotebook.com/Algebra1/Quadratics/QDVertexForm.html
Answer:
-16
Step-by-step explanation:
-5 + 4 = -17 + 5 - 4
0 = -16
Answer: -16
5x+1(6-4) = +1(5x6)-(5x)