Risk factors and causes. The retina is the layer of tissue that lines the inside of the eye. It is light sensitive and its function is to send visual signals to the brain, through the optic nerve. Eye trauma can cause a detached retina. Retinal detachment happens when this layer is pulled from its normal position.
Completing the Square: Finding the Vertex (page 1 of 2) The vertex form of a quadratic is given by. y = a(x â h)2 + k, where (h, k) is the vertex. The a in the vertex form is the same a as. in y = ax2 + bx + c (that is, both a's have exactly the same value). The sign on a tells you whether the quadratic opens up or opens down.
From here, finding the vertex is very simple: take the value in the parentheses #(-2)#, and reverse the sign, so that now you have #2#. Congratulations, you just found your #x#-value of the coordinate pair. To find the #y#-value, just take the value of the constant, and don't change any signs; just leave it alone. Now you have all you need to create a coordinate pair. #(2, -3)# is the vertex, and lest's just confirm that by graphing the original equation. graph{y=x^2-4x+1}. And the vertex is #(2,-3)#!