Polynomials, Rational Expressions, Equations and functions

Algebra
Tutor: None Selected Time limit: 1 Day

Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.


 f(x) = x2 + 2x - 9

Mar 17th, 2015

The x value of the vertex is given by -b/2a

= -2/2(1) = -1

f(x) = y = (-1)^2 + 2(-1) - 9

= 1 - 2 - 9 = -10

The function is a parabola, so

it has a MINIMUM at (-1, - 9)

Mar 17th, 2015

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