NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
RE
̀
N LUYÊ
̣
N KY
̃
NĂNG VE
̃
ĐÔ
̀
THI
̣
HA
̀
M SÔ
́
Y = AX + B (A ≠ 0)
.%2
3
/
'#
/%
.
4$# $# 51
/01
"2
()
≠,"#2
3
51
:
"8
"8
3# ;"56
7
/%
"
"8
<="01
"2
4!"8
'
!"
%.
@
@
9@AB
C
'3
7
+D!"
-
01
56
7
/%
3
G+H4I/
'-
"#(, ⇒
J
) (
4/01
/
'+
J
) (
F,-.
#/
'
/%
"
51
'$%
()
*+≠,-+H/
'-
'1
NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
K
#
/%
"8
5
3#
<"
<=
'
-#
/%
2
K.
/01
"2
-#
"#
"/%
2
H.
/01
"2
"#.
'33# H!"
$/#
#
'%
.
/
5
#
"%73%
8
!56
7
/%
"#&
"8.
'
3# I
!"
$/#
#
"$.
56
7
":
"
%
/01
"2
32
"
""
";"% E=:
$#E
0
G.
":
":
""
"
=:
/01
"2
(K)$# $#
51
/01
"2
'%
'2
!"2
#
/%
-<#
.
#/
'
"/%
"
34"
7
:
#
/%
E
:
'#
/%
/
'4
.
#
/
'
"/%
"
#
3E
#
M- (J)
K+K!"
-
y
x
O
3
5
2 4
6
-1
-2
1
2
3
4
-1
-2
-3
5
1
7
7,5
-2,5
B
y = 2x + 5
y = -1,5x + 5
-#
K)*K()⇒)(JK
")(JK5
#!"01 3:
"()
/01
(JK58
#
/%
/
'.
+JKFJK-
NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
III. Hươ
́
ng dâ
̃
n vê
̀
01
56
7
/%
"
"
'$%
()*+≠,-
A
'56
7
/%
"
"
'$%
(K)*K5
(K)JK3
'%
́
Y = AX + B (A ≠ 0) (tiê
́
p)
!"#
$"
%
&%
"
/01
"2
()
≠,"#2
3
51
/01
"2
()
(,
"
""
#3# 5
56
7
/%
<="01
"2
4!"8
'
!"
4$
">32
"
'5
/
;
'
3?
'1
H
NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
O
#
/%
"8
5
3#
<"
<=
<=
E
<=
E
K JH
( ) * KF ( ) * K
H K
"#&
"856
7
":
"3# I
!"
4$/#
#
.
56
7
":
"
P'#
"8
2
K
%
/01
"2
$# $# 51
3
G
/
'#
/%
2
42
":
'#
/%
/
'E
&
'5
/
#
/%
2
"(5
#!"01 3:
"
01 0
"#&
"8:
'#
/%
/
'
5
3# H!"
$/#
#
"
.
K
K
)
(J)*K
-
+I!"
-
x
6
y
4
5
O
1 2
3 4
7
-1
-2
-3-4
-5
-6
1
2
3
5
H
K
+ =
= −
−
=
#
/%
/
'+
H
F
K
−
-
&
'
"(5
#!"01 3:
"
H
F
H
-
K+,!"
-
-$5:
;"(,":
K
−
=
+"0
;"% !"
)(JK"0":
"56
7
-
-&
-
NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
01
M875
"
+K!"
-
!
36
.
;
7
2 56
7
/%
"
3# '2
'$%
#E
HBA
̀
I TÂ
̣
P VÊ
̀
ĐƯƠ
̀
NG THĂ
̉
NG SONG SONG
VA
̀
ĐƯƠ
̀
NG THĂ
̉
NG CĂ
́
T NHAU
)
/
""
$%
43#
#
"
S
/
"/01
3
"2
2
"
96
:
"8
"8
3# 56
7
":
"5
:
"#
"8
<=
7
+I!"
-
/
;
/
"/01
"2
()*+≠,-5
/01
"2
(T)T*T
+T≠,-3
"4$# $# 42
"E
TF2
";"5
":
;"≠T+,/
'-
'1
#
/%
"8
5
3#
<"
<=
'$%
$# $# 51
/01
"2
(JK)
- C"
x =1+ 2 th × y = 2+ 2
7
)
/
""
$%
"
'$%
()
*H;"/%
"2
(JK)(
JK
+K!"
-
-=:
/%
"
"
'$%
()*H
$# $# 51
/01
"2
(JK)
(JK
E
"
) (* KF ( K * K
5
#"
'$%
/01
K * K ( +* K- * H
K * K J H K J
( (
* K * K
+ K J-+* K-
( ( HJ K K
+* K-+* K-
⇒
S
/
""
'$%
()*
'#
"#
"/%
2
JK
"#&
"83# H!"
.
'
3$/#
#
'%
.
3:
"
/%
"
""
'$%
.
- /01
"2
2
"
- /01
"2
$# $# 51
"
- /01
&
"
'$%
(+K'*-)*K;UH.
"
'$%
8
"8
":
K'*≠,⇒'≠
K
−
:
'/
;
/%
K K ,4I + ≠ ⇒ ≠
&
" /01
"2
+M- 5
+MT- 2
"":
'(±,4I
01 0
"#
"
"!"8
5
E
K * K ( +* K- * H
K * K J H K J
( (
* K * K
=:
/%
"
2
3
"#
"
/
'#
"#
"/%
2
JK /%
#/
'$%
(+K'*-)*K;UH
.
"
'$%
8
"8
":
K'*≠,⇒'≠
K
−
-+M-2
+MT-⇔
K K ,4I + ≠ ⇒ ≠
&
"/01
"2
−
≠
+ ≠
=
+ = ⇔ = ⇔
≠ −
≠ −
≠ −
-+M-≡+MT-⇔
K
K ,
K K
K
K
01
M875
"
+K!"
-
S6'.
.:
"
/01
"2
$# $# 4/01
"2
2
"
S6'.
":
H K = +
OBA
̀
I TÂ
̣
P VÊ
̀
ĐƯƠ
̀
NG THĂ
̉
NG SONG SONG
VA
̀
ĐƯƠ
̀
NG THĂ
̉
NG CĂ
́
T NHAU(Tiê
́
p)
)
/
""
$%
43#
#
"
436
.
;
7
2 56
7
/%
"
'$%
8
"8
$#"#/%
"
"
.
"/01
"2
2
"
96
:
"8
"01
"2
@
@
9@AB
C
'3
7
+I!"
-
/
;
/01
"2
(T)T*T+T≠,-$#
$# 51
";"5
":
;"(TF≠T5
3
";"5
":
;"(TF(
TF2
";"5
":
;"≠T+,/
'-
56
7
/%
"
"
'$%
$3
'%
'2
!"2
#
/%
K H
KF K
7
)
/
" "
$%
3# '%7
301
"1
!$
- &%
"
"
' $%
+- 2
/01
/01
"2
( JH) *K
/
'#
/%
2
I
S
/
""
$%
;"/%
"
(K)J
/01
(KKJ(HM#/#
#
/
'
+KFH-"%
/%
"
"
'$%
+-
#
H(KUO
H4I⇒ =
=8
"
'$%
()
* F
HF H H
H
= + = −
3
'%
'2
!"2
#
/%
Q8
&
"83# I!"
/#
-1
-2
-3
-4
-5
y=2/3x + 2
y=-3/2x + 2
M N
K+H!"
-
-")(K5
#"
'$%
(K)J
/01
(KKJ(HM#/#
#
/
'+KFH-"%
'$%
(JH)*K
/01
I(JH)*K⇒)(J
#/#
#
/
'+JFI-"%
/%
"
"
'$%
+-#
I(+J-UO⇒(JV58
"
'$%
−
-+K-
=1
3
#
;":
/%
"
"
'$%
+-5
+K-.
"/01
+K-.
"/01
"2
$# $# E
&%
"
""
'$%
+-5
+K-.
"
/01
"2
$# $# ;"5
":
;"
-1
-2
-3
-4
-5
(1)
(2)
(3)
D
B
E
F
C
A
O+N!"
-
&%
"
""
'$%
+-5
+K-.
-
=
"
)6'.
M
/
7
"0
7
A
'.
35
#51
56
7
IBA
̀
I TÂ
̣
P VÊ
̀
SƯ
̣
XA
́
C ĐI
̣
NH ĐƯƠ
̀
NG TRO
̀
N,
TI
́
NH CHÂ
́
T ĐÔ
́
I XƯ
́
NG CU
̉
A ĐƯƠ
̀
"/01
3#
4:
""8
/%
)0
/01
3#
96
.
;
7
2 56
7
":
4#'!
@
@
9@AB
C
'3
7
+W!"
-
%
/01
3#
/01
%
/01
3#
/01
)
/
";"
+I/
'-
8'5
;:
"
":
"+I/
'-
O
B
C
A
'1
#
/%
"8
5
3#
<"
<= "
"
/
+-8
!"1
!
/
'
#
C/
/
'
%
/
"2
K'
+O-.
/01
'
+I-#
C/
/
'"#
"1"#2
2
K'
+H-":
"3#
8'
;:
"K' %
'
E
E
<=
8
"0
7
/
' K'
+N-#
C/
/
'.1
"1K'
"#.
'3# H!"
$/#
""
-
'%
'
#
'%
"
.
/01
;:
"
/01
3#
7
5
%
M /
4
"
7
"<4CAE
<#
GT.
3 /
'
⇒&
:
E
GX (
K
E
8
!"#'
"#
=6
7
/01
3#
+G-#
/01
;:
"4#
2
#
5% 1
4 #
GT.
3 /
'
⇒
GX (
K
⇒GT(GT(GT
⇒44∈+GT-
⇒G≡GT
"G(G
-
<%
!
GF
K
/%
M
2
'%
0
""
⇒5%
H+I!"
-
NguyÔn ThÞ HuyÒn Th¬ng - Trêng THCS T¹ Bó
E
E
E
"E
Q8
0
"<4CA5
#51
"0
'"⊥4P⊥E
"0
'"C5% #
51
E
5:
⊥4P⊥5
P
.
/01
/01
3
0
51
"
5
2
'%
0
"
.
'
5% ⇒
⊥
"0
C.
30
8'
'
⇒C⊥
01
M875
"
+K!"
-
#
"6#<C5
51
"
A
35
3:
8'/01
3#
/#
- :
"
;:
"
/01
3#
/#
4
C"2
$8;
"0
/01
;:
".
M8.1
"8
/01
3#
5
3#
96
;
7
2 56
7
":
"4$.8
"0
'"
Q":
"'%"#
"8
<=
!"
4"01
C
'3
7
+W!"
-
K