# LESSON 9-7 PROBLEM SOLVING SQUARES AND SQUARE ROOTS

They might give different x x ways of solving the problem. There are two ways of finding the quadratic equation given its roots: It is divided into seven lessons namely: Let the students apply the concepts they learned to find the rule that represents the quadratic relationship in the problem. Share buttons are a little bit lower. Example 3A Simplify the expression.

Give Activity 4 and let the students observe the graph of the quadratic function. Ask the students to have a closer look at some aspects of equations transformable to quadratic equations. Remind them of the procedure in getting it by using the sum and product of the roots Module 1, Lesson 4. Solving problems Identifying involving quadratic zeros of Describing the functions quadratic transformation function from of the graph of the graph. Mathematical Complete Substantial Understanding of Limited Concepts understanding of understanding of the the mathematical understanding of the mathematical mathematical concepts needed the concepts and concepts and their concepts and their and their use in their use in use in creating the use in creating the creating the designs creating the design design are evident. If the area of the square table is 3 m2, then the length of its side is 3 m. This activity allows the students to solve problems on maximizing profit involving quadratic functions.

Nature of Roots of 7.

Analyzing All the Some of the Not all the Some of the Problems characteristics of a characteristics characteristics squarea a characteristics of a problem are of a problem problem are problem not analyzed. Which of the following is true about the solution set of the inequality?

You may start this lesson by giving Activity 1. In this activity, the students will be able to develop their mathematical thinking skills.

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Free Homework Highlight the Mathematical Practices that this lesson incorporates: The first activity that the students will do in this lesson is to describe and simplify expressions involving square roots and other mathematics concepts.

At this stage, however, the students may not be able to simplify these solutions because simplifying radicals has not been taken up yet. March 24, A.

The latter gives the students an opportunity for the student to recall the process squarez finding the solution of a system of suare equation in 3 variables. At this point, make students realize that some methods for solving quadratic rpots are easier to use for a particular equation than others. In this activity, the students should be able to understand very well the problem, identify the unknown quantities, and write quadratic equations to represent the relations among these quantities.

The lesson provided the students with opportunities to describe quadratic equations and solve these by factoring.

The equations formulated are quadratic equations. This is a lesson under factoring which the students already studied in Grade 8. I and II B. Let the students use the mathematical ideas involved in determining the nature of roots of quadratic equations and the examples presented in the preceding section to answer the succeeding activities.

At this point, the students should realize that only positive solutions are used to indicate length. Write-up and presentation Determining the equation of the scale model. This lesson was sopving quadratic equations and how they are illustrated in real life.

Ask them to explain how they arrived at their answers. Before the students move to the next section of this lesson, squade a short test formative test to find out how well they understood the lesson.

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Quadratic inequalities are inequalities that contain polynomials of degree 2 and can be written in any of the following forms. Part I Part I Part I Part I Identifying Finding the Solving problems Products and quadratic maximum point involving quadratic performances functions and of a quadratic functions related to or their graphs. Let them perform Activity If the area of the square table is 3 m2, then the length of its side is 3 m.

## Solving quadratics by taking square roots

Give Activity 4 and let the students observe the graph of the quadratic function. Yes March 24, Before proceeding to the next activities, let the students give a brief summary of the activities done. The graph of a linear function is a straight line while the graph of a quadratic function is a curve. rotos

The equation of the function represented by the graph at the right is y a. However, in quadratic function, equal differences in x do not lead to ldsson first differences in y; instead the second differences in y are equal.

# (PDF) Math 9 tg draft | Diane Dabalos –

The lesson provided the students with opportunities to describe quadratic equations and solve these by completing the square. Activity 6 Answer Key Hidden message: What Are My Dimensions? The function should be: