Lớp 10T Tiết 28 LESSION PLAN THE SYSTEM OF EQUATION 1.. Knowledge: Students use knowledge: the system of equation and solution system of equation b.. Skills: Know how to solution, and
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Tuần 14 Ngày 4 / 12 / 2015 Lớp 10T Tiết 28
LESSION PLAN THE SYSTEM OF EQUATION
1 Aim of The Lesson:
a Knowledge:
Students use knowledge: the system of equation and solution system of equation
b Skills:
Know how to solution, and applications solution system of equation
c Attitude:
• Careful, accuracy in calculations and reasoning
• Positive sense of learning, creative thinking
• Understand and apply solution system of equation
2 Subject Matter
- Reference: Algebra - Analysis for High-school Textbook
- Materials: Sheets of paper, Puzzles
3 Procedure
Exercise 1: Solve the system of equation
7 1(1)
10 1(2)
Solution Reviews:
1
y= : system of equation satisfactory
1
y≠ , (1) x 7y 1
y
−
⇔ =
We substitute into (2), we obtain:
39y +34y −8y −2y+ =1 0
2 (y 1)(3y 1)(13y 6y 1) 0
1 1 3
y y
= −
=
Thus, the solution set is (8; 1 ; 10;) 1
3
−
Exercise 2: Solve the system of equation
2
(2 )( ) (2 1) 7 2
(4 1) 7 3
Solution From (2)⇔ =7 4x2+ +x 3y
We substitute into (1), we obtain:
(2x +y x y)( + +) x x(2 + =1) 4x + +x y
Trang 2
2 (x y 1)(2x y) 0
2
1 2
= −
Substitute y= −1 x into equation (2), we obtian
2
1 17 4
1 17 4
x
x
=
− − = ⇔
=
Substitute 2
2
y= − x into equation (2), we obtian 2
2x − + =x 7 0 ( no real roots) Thus, the solution set is
1 17 3 17 1 17 3 17
Exercise 3: Solve the system of equation
1
x y
+ = −
− = −
Solution Hint:
(1): y= − −1 x
Thus, the solution set is (1; 2 ;) 1 1; , 2;1( )
2 2
−