DLL-8 (WEEK 1, Day 2)
DLL-8 (WEEK 1, Day 2)
DLL-8 (WEEK 1, Day 2)
MATHEMATICS 8
QUARTER I
Week 1
( x + 8) ( x – 8 ) = x2 – 64
( 2x + 4) ( 2x – 4) = 4x2 – 16
( 3a + 5) ( 3a – 5) = 9a2 – 25
QUESTIONS:
1. What have you observe on the product?
Expected answer: when we multiply two binomials with positive and
negative signs in between the product has two terms.
2. What do you call this product?
Ans. Binomial
QUESTIONS:
1. How many factors did you obtain?
Ans. Two factors
2. What are your observations based on the factors?
Expected ans. The factors are the positive square roots of each
term.
3. What is the operation on the first factor? How about the second
factor?
Ans. First factor- positive, second- negative
(Teacher must guide every responses of the learner and discuss the
topic)
D. Discussing new ACTIVITY: COMPARE US!
concepts and
practicing new skills Take a look of the following:
#1
(x + 1)(x-1) = x2 – 1 = (x+1)(x-1)
Instructions: Using the pattern you have learned, tell whether the
following can be factored using sum and difference of two squares.
Let the learners formulate their own given binomials that can be
factored using sum and difference of two terms. Let them solve on the
board. (Answers may vary)
Example:
A 5m x 5m landscaping is to be done in one corner of a 20m x
20m garden. Find the area of the field that was not affected by the
project.
Possible answer:
1. a2 – 16 = (a + 4) (a – 4)
2. 9x2 – 4 = (3x + 2) (3x – 2)
3. 64c2 – 1 = (8c + 1) (8c – 1)
4. 100y2 – 49z2 = (10y + 7z) (10y – 7z)
5. y2 – 81 = (y + 9) (y – 9)
VI. REFLECTION
A. No. of learners who A. ____No. Of learners who earned 80% in the evaluation.
earned 80% in the
evaluation
B. No. of learners who
require additional B. ____No. Of learners who require additional activities for remediation.
activities for
remediation
C. Did the remedial
lessons work? No. of C. Did the remedial lessons work? ____No. of Learners who have caught
learners who have up the lesson.
caught up the lesson
D. No. of learners who
continue to require D. ____No. of learners who continue to require remediation
remediation
E. Which of my teaching Stragegies used that work well:
strategies worked well? ___Group collaboration
Why did these work? ___Games
___Powerpoint Presentation
___Answering preliminary activities/exercises
___Discussion
___Case Method
___Think-Pair-Share(TPS)
ASSIGNMENT
Factor: m2 – n2
Solution:
1. Is m2 a perfect square? Yes! m2 = m ˑ m
2. Is n2 a perfect square? Yes! -n2 = -n ˑ n
3. The factors of m – n are (m + n) and (m – n)
2 2
4. M2 – n2 = (m + n)(m – n)
1. n2 – p2
2. e2 – x2
3. b2 – 49
4. c2 – 25
5. d2 – 16
6. x2 – 36
7. y2 – 81
8. 16c2 – 64
9. 4r2 – s2
10. m – 64m3