Topicm26a1e63a715e4c41_1528449000663_0Topic

Solution of the equation

Levelm26a1e63a715e4c41_1528449084556_0Level

Second

Core curriculumm26a1e63a715e4c41_1528449076687_0Core curriculum

VI. Equations with one unknown. The student:
1) checks if the given number is the solution of the equation (first, second or third degree) with one solution.

Timingm26a1e63a715e4c41_1528449068082_0Timing

45 minutes

General objectivem26a1e63a715e4c41_1528449523725_0General objective

Using mathematical objects, interpreting mathematical concepts.

Specific objectivesm26a1e63a715e4c41_1528449552113_0Specific objectives

1. Checking if a given number is a solution of an equationequationequation.

2. Identifying the number of solutions of the equationequationequation.

3. Communicating in English, developing basic mathematical, computer and scientific competences, developing learning skills.

Learning outcomesm26a1e63a715e4c41_1528450430307_0Learning outcomes

The student:

- checks if a given number is a solution of an equationequationequation.

Methodsm26a1e63a715e4c41_1528449534267_0Methods

1. Discussion.

2. Brainstorming.

Forms of workm26a1e63a715e4c41_1528449514617_0Forms of work

1. Individual work.

2. Group work.

Lesson stages

Introductionm26a1e63a715e4c41_1528450127855_0Introduction

The student chosen by the teacher does a revision of information about equationequationequation that students learn so far.
The teacher introduces the subject of the lesson – if a given number is a solution of an equationequationequation.

Procedurem26a1e63a715e4c41_1528446435040_0Procedure

Discussion – how to check if a given number is a solution of an equationequationequation.

Students look for answers by analysing specific examples.

Task
Students work individually, using computers. Their task is to check if the given number is a solution of the equationsolution of the equationsolution of the equation.

[Slideshow]

They sum‑up their discussion with conclusions:
- A number satisfies an equation if after substituting it instead of the unknown and doing operations on both sides of the equation, we obtain and equation that is true.
- A number that satisfies the given equation is called the solution of the equation or the root of the quation.
- The set of all numbers that satisfy the given equation is a set of solution of the equation.
m26a1e63a715e4c41_1527752263647_0They sum‑up their discussion with conclusions:
- A number satisfies an equation if after substituting it instead of the unknown and doing operations on both sides of the equation, we obtain and equation that is true.
- A number that satisfies the given equation is called the solution of the equation or the root of the quation.
- The set of all numbers that satisfy the given equation is a set of solution of the equation.

Students use obtained information in exercises.

Task
Students work in pairs. The first person gives a number than can be a possible solution of an exemplary equationequationequation, the other person checks if after substituting this number in the equationequationequation, we obtain a true equationequationequation. Then students change roles.

Task
Check if the given number is a solution of the given equationequationequation.

a) 2(x - 1) + 4 = 6                    x = 2

b) -x = 4(x + 3) - 2                 x = -2

c) -2x - 3 = 4(x - 1)                x = -1

Task
Match an equationequationequation with its solution.

2x ‑ 1 = 0

-12

3y = 0

4

z = 2z ‑ 4

0

x + 12 = 0

12

Task
Check which equationequationequation is satisfied by the number -3.

a) 2(x - 2) = -10

b) 3(x - 3) = -18

Task
What number can be inserted in the dotted space so that the solution is the number next to the equationequationequation.

a) ...x+2=12 
x = -3

b) 3(x+...)=2x+3 
x = -2

c) x+1=2x... 
x = -1

An extra task:
Give the set of solutions for the equationequationequation z2=100.

Lesson summarym26a1e63a715e4c41_1528450119332_0Lesson summary

Students do the revision exercises.

Then together they sum‑up the classes, by formulating the conclusions to memorise.
- A number satisfies an equationequationequation if after substituting it instead of the unknown and doing operations on both sides of the equationequationequation, we obtain and equationequationequation that is true.
- A number that satisfies the given equationequationequation is called the solution of the equationsolution of the equationsolution of the equation or the root of the equationroot of the equationroot of the equation.
- The set of all numbers that satisfy the given equationequationequation is a set of solution of the equationset of solution of the equationset of solution of the equation.

Selected words and expressions used in the lesson plan

equationequationequation

number that satisfies the equationnumber that satisfies the equationnumber that satisfies the equation

root of the equationroot of the equationroot of the equation

set of solution of the equationset of solution of the equationset of solution of the equation

solution of the equationsolution of the equationsolution of the equation

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equation1
equation

równanie

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wymowa w języku angielskim: equation
solution of the equation1
solution of the equation

rozwiązanie równania

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wymowa w języku angielskim: solution of the equation
set of solution of the equation1
set of solution of the equation

zbiór rozwiązań równania

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wymowa w języku angielskim: set of solution of the equation
root of the equation1
root of the equation

pierwiastek równania

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wymowa w języku angielskim: root of the equation
number that satisfies the equation1
number that satisfies the equation

liczba spełniająca równanie

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wymowa w języku angielskim: number that satisfies the equation