Y intercept of parabola- y equals x minus1 x plus 3?

Answer 1

Well, when a parabola is in the form y=ax^2+bx+c, we know that c is the y-intercept.

So all we need to do with this equation is expand it into that form.

y = (x-1)(x+3)

Expand

y = x^2-1x+3x-3

Collect like terms

y = x^2+2x-3

And there you have it. Your y-intercept is -3.