Given the specific values of a and b in (a) and c= -1, find the zero(s) of the function?

Let f(x) = ax^2+ bx+ c be a quadratic function, where a, b, c, are parameters.

Given the specific values of a and b in (a) and c= -1, find the zero(s) of the function?
Is your question:





f(x) = ax^2 + bx - 1 ------where are the zeroes?





quadratic formula = (-b +/- sqrt(b^2 - 4ac)) / 2a





plug in values for a, b %26amp; c to find the zeroes. (I don't know what a %26amp; b are, but plugging in -1 for c:





(-b +/- sqrt(b^2 + 4a)) / 2a
Reply:I presume what we are saying is:





find the zero's of f(x) = ax^2 + bx - 1





By the quadratic formula:





x = (-b +/- sqrt(b^2 - 4(-1)(a))) / ( 2a)


= (-b +/- sqrt(b^2 + 4a))/(2a)
Reply:delta=b^2-4ac


delta=b^2-4a(-1)


delta=b^2+4a





x1=-b+sqrt(b^2+4a)/2a


x2=-b-sqrt(b^2+4a/2a


Does this answer your question?