Ашық сабақ Solve equations 8 сынып

Oskemen Nurorda school-lyceum

Date: 12.12.22

Teacher’s name: Assel Dosmakhan

Grade: 8A

Number present:

Number absent: 

Theme of the lesson:

Solve equations

Learning objectives

8.2.2.7 Solve the equations given for quadratic equation ;

Lesson objectives

All learners will be able to:

• Know the concept of a reducible equation;

• Substitute variables;

• Find the roots of equation reducible to quadratic form;

Lesson structure

Planned timings

Teacher activity

Student

activity

Evaluation

Resources

Beginning

The lesson greeting.

The teacher sets the lesson objectives, 

letting students know what to anticipate from the lesson.

Lead-in.

Then to create a positive learning environment the teacher asks students

to start the lesson giving each other compliments about appearance, job performance, talent, etc. and also practice accepting compliments.

Students greet the teacher

Give each other compliments 

Individual evaluation

Middle

Repeat the previous lesson

Exercise 1

1. b-?

2. c-?

3. а-?

4. a-?

5. c-?

Exercise 2

Solve the equation

Given:

Second equation:

1. How can we solve it?

2. What is the problem here?

Explanation:

Certain equations that are not quadratic can be written in quadratic form using substitutions. For example, we can write equation such as

in quadratic form, because the exponent of the first variable is twice the exponent of the second variable.

Algorithm of solving equation reducible to quadratic form:

1. Introduce a new variable:

2. Then it will be аt² +bt+с=0

3. First we solve for .

4. Then solve the resulting equations for x.

5. Since .

6. Write answers.

Example:

Roots : 3, -3

Practice work

Plickers game

HW: practice 17,page 76

Students say coefficients of each equation

1. b-? (-3)

2. c-? (-3)

3. а-? (-1)

4. a-? (-1)

5. c-? (4)

Solve equation by quadratic formula

Given:

Roots : -1,-5

Solution:

Give some ideas of solving reducible equation

Solve equations then answer with qr cards

Roots : -4,-1,1,4

b)

Root : 0

c)

Roots : -2,-1,1,2

Verbal evaluation

Teacher’s evaluation

Presentation 1-4

Plickers cards,

whiteboard

End

Reflection

«Instagram assessment » method

- like it

- see it

- want to live comments

Reflect the lesson

Peer assessment