What is the vertex formula of quadratic function? Vertex formula, not vertex formula The vertex formula is y = a (X-H) ^ 2 + K. I know, but I don't know how to match it. I need a formula

What is the vertex formula of quadratic function? Vertex formula, not vertex formula The vertex formula is y = a (X-H) ^ 2 + K. I know, but I don't know how to match it. I need a formula

y=ax^2+bx+c=a[x-b/(2a)]^2+(4ac-b^2)/(4a)