What is the vertex form of $y=2x^2+9x-5$ ?

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Answer 1 · 2018-06-25T11:47:44

Vertex form of equation is $y=2( x +2.25)^2- 15.125$

$y=2 x^2+9 x-5$ or

$y=2( x^2+4.5 x) -5$ or

$y=2( x^2+4.5 x +2.25^2)- 2*2.25^2 -5$ or

$2*2.25^2$ is added and subtracted to get square.

$y=2( x +2.25)^2- 15.125$

Vertex is at $-2.25,-15.125$

Vertex form of equation is $y=2( x +2.25)^2- 15.125$ [Ans]

What is the vertex form of y=2x^2+9x-5 y=2x^2+9x-5 ?