find the vertex: f(x)= 2xsquared +5x + 1

Thank you for the opportunity to help you with your question!

Vertex = -b/2a = -(5)/2*2 = -5/4 :) or 1.25

y = 2(-5/4)^2 + 5*(-5/4) + 1 = -2.12

vertex = (-1.25,-2.12)

Solve by completing the square: x squared +4x +53 =0

You'll have to post that as a different question :)

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