** DO ON 4.8 (2) NOTES W.S. **
WARM-UP : Solve using the quadratic formula → 16x2 – 23x = 17x - 25
SOLUTION:
Standard Form: 16x2 – 40x + 25 = 0
a=16, b= -40, c=25
Section 4.8
Objective (DAY 2):
Find the discriminant.
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Discriminant: _____________________________________________________________
If discriminant type /# of is:
solutions
Examples of graphs
# of Methods for x­intercepts
solving
> 0
= 0
< 0
Examples:
For each quadratic equation: 1.) evaluate the discriminant, 2.) state the # and type of solutions,
3.) # of x-intercepts, 4.) choose an appropriate method and solve.
1.) ­16x2 + 34x ­ 20 = 0
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2.) 3x2 ­ 2x ­ 1 = 0
3.) y = 3x2 ­ 22x ­ 6
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4.) y = 8x2 ­ 8x + 2
Section 4.8 (2) HW
PG 296­297, #31­45 all & 52­55
(on bottom of note guide)
FOLLOW THE DIRECTIONS IN THE BOOK!!!
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