How do you write $f(x) = x^2 + 4x$ in vertex form?

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Answer 1 · 2018-03-25T11:59:17

The vertex form of equation is $f(x)=(x+2)^2-4$

$f(x)=x^2+4x or f(x)=x^2+4x+4 -4$ or

$f(x)=(x+2)^2-4$ . Comparing with vertex form of

equation $f(x) = a(x-h)^2+k ; (h,k)$ being vertex we find

here $h=-2 , k=-4 , a=1:.$ Vertex is at $(-2,-4)$

The vertex form of equation is $f(x)=(x+2)^2-4$

graph{x^2+4x [-10, 10, -5, 5]} [Ans]

How do you write f(x) = x^2 + 4xf(x) = x^2 + 4x in vertex form?