October 24, 2008

Hey,

Last friday, we talked about the Discriminant.

To find the discriminant you need (b² -4ac).

For example: -2x + x² - 4

First, reorder them as ax² + bx + c.

x² -2x -4

Second, use the discriminant formula. (b² -4ac)

-2² -(4)(1)(-4)
4 - 16 = -12

Our disciminant is -12, therefore D Abosulute Value.

For example, the absolute value of |1| is 1 and -1.

Next is Rational Exponents.

√x = x½
³√x = x⅓