แผนการจัดการเรียนรู้ บทที่3

2. 2x y + 3 = 0 x, y

............................................................................

y = ............................................................................

xy .................................................................

x
y

............................................................................................ .....................................

(1)

:
1. x y 2 = 0 x, y

x y 2=0

y = .....x...-...2.................................................................
....................y...=....x...-...2................................
xy

x -1 0 2
y -3 -2 0

............(..-.1..,...-.3..).,...(.0..,..-..2..).,...(.2..,..0...)............................................................................. ....

.................................................................................................. ....................... .................

2. 2x y + 3 = 0 x, y

2x y + 3 = 0

y = ....2..x....+....3..............................................................

xy .............y....=....2..x...+....3...................................

x -2 0 1
y -1 3 5

..............(..-.2..,..-..1..).,...(.0..,..3...).,..(.1...,..5..).................................................................................

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43 (2)

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1.
1.3

1.3 1/2

Ax + By + C = y = ax + b

xy xy

3. K)
3.1 P)
A)
3.2
(2)
3.3

4.

5
5.1
5.2
5.3

6.
6.2

1)
2)
6.3
7.
7.1

8 Concept Based Teaching

1. Prior Knowledge) 1
x 0
y
1) y = 2x 2
-1 0
x -4 -2

y

Knowing) Ax + By + C = 0 2
4xy
2.
: 5x2 + 3y + 7 = 0
: Ax + By + C = 0 2
:
: 1)
3x + 4xy + 20 = 0

xy
2)
5x2
3)

3. Ax + By + C = 0 A, B C A=0 B 0
:

: By + C = 0

4.
Ax + By + c = 0

A=0 B 0
(0)x + By + c = 0
By + c = 0

y = ,B 0

5.
1 4y + 8 = 0
4y + 8 = 0 (0)x + 4y + 8 = 0
4y + 8 = 0
4y = -8

y=

y = -2
4y + 8 = 0 y = -2

x y = -2

6. 1

: y = -2

: x x2

: y = -2 y

: y (0, 2)

: (-3, y) y = -2 y

: y = -2

7. A 0 B = 0
Ax + By + c = 0

A 0 B=0
Ax + (0)y + C = 0
Ax + C = 0

x = ,A 0

8. 3x 9 = 0
2 3x 9 = 0 3x + (0)y 9 = 0

x=

x=3
3x 9 = 0 x = 3

y x3

9. 2

: x=3

: y y3

: x=3 x

: x (3, 0)

: (3, 0) x=3 x

:x=3

Understanding)
10.
11.

1) x = 4
2) x = -3
3) y = 3
4) y = -6
12. 4

13.

Doing) (2)
14.
15. 2-3

16.

17. Ax + By + C = 0 A,B C
1)
A=0 B 0 y= ,B 0
y=0
2) X x y ( , 0)
A 0 B=0 y x
x=0
y

. (K) 60
2
2 2

(P)
3

A)

. 32 1
80 60-79 59
(K)
2 y y
y
(P)

3
A)

10. (2)
21
10.1
- .....................................................
- ()

10.2
-

11.

ป๊ื



(2)

: 2) x = -4
4) y = -7
1) x = 5 6) y = 2x - 5
3) y = 2
5) y = 2x + 4

(2)

: 2) x = -4
4) y = -7
1) x = 5 6) y = 2x - 5
3) y = 2
5) y = 2x + 4

Y

x = -4 x=5

10 y = 2x + 4
9
y = 2x - 5
8

7

6

5

4

3
2 y=2

1

-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 -1 1 2 3 4 5 6 7 8 9 10 X
-2 y = -7
-3
-4
-5
-6
-7
-8
-9

-10

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1.
1.3

1.3 1/2

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