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MR. TOWNSLEY'S
MATH DEPARTMENT


ALG. 2 INSTRUCTIONS FOR 9/27/01

Today's assignment: p. 233 #1-29 ODD and 33-45 ODD. Also p. 235 1-27 ODD

This assignment will again use the ZERO PRODUCT PROPERTY:

If ab = 0, then a = 0 or b = 0.

This time you will need to FACTOR to solve the equations.

EXAMPLES

p. 233 #2

y2 - 4y - 45 = 0

(y - 9) (y + 5) = 0

y - 9 = 0 or y + 5 = 0

y = 9 or y = - 5

#8

t2 + 9t = 0

t (t + 9) = 0

t = 0 or t + 9 = 0

t = 0 or t = - 9

# 14

For this type, you will need to write the equation in standard form. Standard form has all terms on one side, set equal to 0.

a2 + 3a = 40 subtract 40 from both sides.

a2 + 3a - 40 = 0 standard form

(a + 8) (a - 5) = 0

a + 8 = 0 or a - 5 = 0

a = - 8 or a = 5

#25

2x2 - 15x = - 7

2x2 - 15x + 7 = 0

(2x - 1) (x - 7) = 0

2x - 1 = 0 or x - 7 = 0

2x = 1 or x = 7

x = 1/2 or x = 7

This should give you a start. Try to start on the word problems as well. The text has some worked out examples at www.phschool.com. We will have a QUIZ ON MONDAY. See the note below.

About the quiz on Monday and Tuesday (10/1 and 10/2)

1) Be able to solve simple equations:

EXAMPLES

3x - 4 = 8

5(x + 2) = 20

1/6 + 1/2 x = 5/6

0.6(2x + 4) = 8 - (x + 5)

Don't forget the ZERO PRODUCT PROPERTY

(x - 7)(x + 5) = 0

x - 7 = 0 or x + 5 = 0

x = 7 or x = -5

2) Also remember to work on word problems (Sections 1.6 and 2.2)

3) There will be 11 equations to solve and 4 word problems.




E-mail Mr. Townsley at ktownsley@po-1.central-clinton.k12.ia.us