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2/15/10 (Monday)
NOTES
CLASSWORK
HOMEWORK
No School
President’s Day
No Homework
NOTES
CLASSWORK
HOMEWORK
Quadratic Equation
An equation that can be written in
the form of ax 2  bx  c  0 , where
a, b, and c are real numbers and
a  0, is a quadratic equation.
Common Assessment
HW#29
Quadratic Equations
CW S.N
PH p. 578 #1-6
Write each equation in standard
from and determine a, b, and c.
1) x 2  3x  2  0
2) x 2  8 x  5  0
3) 2 x 2  3
4) 5 x 2  9
5) 7 x 2  4 x  3
6) 9 x 2  x  5
TB p. 463 #39-42
2/16/10 (Tuesday)
Standard Form
ax 2  bx  c  0
Simplifying Radicals
Factor each number under the radical
sign and find the square root of a
perfect square and bring that number
outside. Keep the remaining factors
under the radical sign.
Finding Square Root and
Simplifying.
Simplify.
(Factor each number under the
radical sign and find the square
root of a perfect square and bring
that number outside. Keep the
non-perfect square factor under
the radical sign.)
1)
2)
3)
4)
5)
49
50
60
80
18
2/17/10 (Wednesday)
NOTES
CLASSWORK
HOMEWORK
Quadratic Formula
Quadratic Equations
HW#30
If ax 2  bx  c  0 , a  0, then
CW S.N
PH p. 593 #1-5
Solve using the quadratic formula.
(Be sure to write down the
quadratic formula every time you
use it.)
1) x 2  4 x  21
2) x 2  7 x  18
3) x 2  6 x  9
4) x 2  8 x  16
5) 3 y 2  2 y  8  0
TB p. 438 #24-27
Factor each polynomial
and set each factor equal
to zero. Then, solve for
each variable.
x
 b  b 2  4ac
2a
gives the solutions of the quadratic
equation. Solutions of the quadratic
equations are called zeroes, xintercepts, or roots.
2/18/10 (Thursday)
NOTES
CLASSWORK
HOMEWORK
More on Quadratics
HW#31
CW S.N
PH p. 593 #10-15
Solve using the quadratic formula.
10) x 2  4  0
11) x 2  2 x  1  0
12) x 2  4 x  7  0
13) y 2  10 y  22  0
TB p.497 #1-4
You do not need to round
your answer to the
nearest tenth. You may
keep your solution as a
radical form. (square
root of some number)
The graph of a quadratic equation
ax 2  bx  c  0 is called a
parabola (U-shaped graph)
-
Opens upward when a is
positive
Opens downward when a is
negative
The solutions of the quadratic
equation are the x-intercepts of the
graph.
14) y 2  6 y  9  0
15) x 2  4 x  4  7
2/19/10 (Friday)
NOTES
CLASSWORK
HOMEWORK
Periodic Assessment
HW#32
Turn in Classwork.
TB p. 497 #9-12
You do not need to round
your answer to the
nearest tenth. You may
keep your solution as a
radical form. (square
root of some number)
Turn in February Calendar for
homework grades. Be sure to get it
back.