## graphing: x^2 - 2x - 8 = 0, determinant of x^2 + 2x + 1 = 0,

Quadratic equations and inequalities, variation equations, function notation, systems of equations, etc.
lchilds
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Joined: Tue Mar 24, 2009 6:47 pm
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### graphing: x^2 - 2x - 8 = 0, determinant of x^2 + 2x + 1 = 0,

1: x^2 - 2x - 8 = 0

2: calculate the value of the discriminant of x^2 + 2x + 1 = 0

3: find corresponding y values for x= -4, -3, -2, -1, 0, 1, 2, if y= x^2 + 2x - 15

stapel_eliz
Posts: 1628
Joined: Mon Dec 08, 2008 4:22 pm
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1: x^2 - 2x - 8 = 0
To learn how to solve quadratic equations, try here.
2: calculate the value of the discriminant of x^2 + 2x + 1 = 0
To learn about the Quadratic Formula, its disciminant, and how to use it, try here.
3: find corresponding y values for x= -4, -3, -2, -1, 0, 1, 2, if y= x^2 + 2x - 15
Plug the given x-values into the given formula, and simplify to find the corresponding values of y.

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