Math 9 Online Aug. 23, 2021

Lesson 1A Illustrations of Quadratic Equations

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​Prepared by:

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​Mrs. Patricia Hanna Jane D. Co

ESLR

Through understanding Quadratic equations, Faithians will acknowledge God as a God of Order and that rules are made out of His love for mankind through His holiness. Faithians will desire to read, study, and obey God’s laws and school rules and regulations.

Bible Verse:

Joshua 1:8

“Keep this Book of the Law always on your lips; meditate on it day and night, so that you may be careful to do everything written in it. Then you will be prosperous and successful”

Principle:

Faithians read, study and obey God’s laws and school rules and regulations.

AIM:

• Identify quadratic and not

• Write Quadratic Equations in Standard Form

Action​

​As we have drawn the rectangular board for Mrs. Jacinto, what equation did we arrive to?

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​Can you describe the equation you obtained?

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​What do we call that equation?

​Quadratic Equation

​in one variable is a mathematical sentence of degree 2 that can be written in the standard form:

​where a, b, and c are real numbers and

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In the equation, ax² is the quadratic term, bx is the linear term and c is the constant term.

Open Ended

Why do you think a must not be equal to zero?

​Examples:

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​2.

3.

Multiple Select

Quadratic or Not? Directions: Identify which of the following equations are quadratic.

• $$3m+8=5$$  

• $$x^2-5x+10=0$$  

• $$12-4x=0$$  

• $$2t^2-7t=12$$  

• $$6-2x+3x^2=0$$  

Multiple Select

Quadratic or Not?

Directions: Identify which of the following equations are quadratic.

• $$25-r^2=4r$$

• $$3x(x-2)=-7$$

• $$\frac{1}{2}\left(h-6\right)=0$$

• $$\left(x+2\right)^2=0$$

• $$\left(w-8\right)\left(w+5\right)=14$$

​Application

​Tell whether or not each of the following situations illustrates quadratic

equations. Justify your answer by representing each situation by a mathematical sentence.

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​1. A motorcycle driver travels 15kph faster than a bicycle rider. The motorcycle driver covers 60km in 2hrs less than the time it takes the bicycle rider to travel the same distance.

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​2. A realty developer sells residential lots of P4000 per square meter plus a processing fee of P25,000. One of the lots the realty developer is selling costs P625,000.

Fill in the Blanks

Fill in the Blanks

Open Ended

Give 3-5 examples of how God shows orderliness.

​Assignment:

Do page 6 of your book A ( odd numbers only) and B (even numbers only)

Write your solution on your notebook.

Enter your final answers here in Quizizz Modular- Aug. 23

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​You are only allowed to answer these within the time of our subject.

​It will not be available once the deadline has been reached.

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