Do You Remember These
Products?
Find each indicated product.
1. 𝟑 𝒙𝟐 + 𝟕
2. 𝟐𝒔 𝒔 − 𝟒
3. 𝒘 + 𝟕 𝒘 − 𝟑
4. 𝒙 + 𝟒 𝟐
5. 𝟐𝒉 + 𝟕 𝟐𝒉 − 𝟕
𝟐
1. 𝟑 𝒙 + 𝟕
4. 𝒙 + 𝟒
𝟐
2. 𝟐𝒔 𝒔 − 𝟒
5. 𝟐𝒉 + 𝟕 𝟐𝒉 − 𝟕
3. 𝒘 + 𝟕 𝒘 − 𝟑
𝒏𝟐 − 𝟑𝒏 + 𝟏𝟎 = 𝟎
𝟏 𝟐
𝒎 + 𝟐𝒎 = 𝟒
𝟑
𝟐𝟓𝒃𝟐 − 𝟏𝟔 = 𝟎
𝟐𝒚 − 𝒛 = 𝟗
𝒅 = 𝟑𝒆 − 𝟕
𝟓𝒘 + 𝟓 = 𝟎
𝟖 − 𝟑𝒌 = 𝟏𝟐
𝟑𝒓 + 𝟐𝒆 = −𝟔
𝟏𝟎𝒖 − 𝟓 = 𝟖
𝒇𝟐 − 𝟑𝒇 + 𝟐 = 𝟎
𝒂𝟐 = 𝟐𝟐𝟓
𝟐𝒙𝟐 + 𝟐𝒙 + 𝟏 = 𝟎
Activity
Mrs.
Velasquez
asked
a
carpenter to construct a rectangular
bulletin board for her classroom.
She told the carpenter that the
board’s area must be 36 square
feet.
36 square feet
Analysis
1. What are the possible dimensions of
the bulletin board? Give at least 2
pairs of possible dimensions.
2. How did you determine the possible
dimensions of the bulletin board?
3. Suppose the length of the board is 9
ft. longer than its width. What
equation represents the given
situation?
4. How would you describe the
equation formulated?
36 square feet
Standard Form
a
b
c
1. 𝟑𝒙𝟐 – 𝟐𝒙 = 𝟑
2. 𝟓 – 𝟐𝒙𝟐 = 𝟒𝒙
3. (𝒙 + 𝟏)(𝒙 + 𝟑) = 𝟎
4. (𝟐𝒙 + 𝟑)(𝒙 – 𝟓) = 𝟎
5. 𝟓𝒙 (𝒙 – 𝟏𝟏) = 𝟏𝟎
JHS SY 2020-2021 - Integrated Mathematics 9
Does It Illustrate Me?
Tell whether or not each of the following situations
illustrates quadratic equation. Justify your answer by
representing each situation by a mathematical
sentence.
1. The length of a swimming pool is 8m longer
than its width and the area is 105 m2.
2. Joshua paid Php 1200 for a pair of pants and a
polo shirt. The cost of the pair of pants is Php
600 more than the cost of the polo shirt.