How do you change the quadratic function [y=x^2+2x-3] into vertex form and intercept form?? I AM STUCK. help.?

It is very important that I figure this out.

It is due Monday October 22nd.

Please help if you can.

Top 1 Answers

A few days ago

hayharbr

Favorite Answer

To get it in vertex form you need to complete the square. This is done here by taking half of the x term coefficient (2) and writing

y = (x+1)^2 which FOILed out is x^2 + 2x + 1, so to get the -3 you subtract 4 getting

y = (x+1)^2 – 4

So the vertex is (-1,-4)

As for intercept form, just FOIL the original: y = (x+3)(x-1) so the x intercepts are -3 and +1

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