MQT1001 TN3
TRAVAIL NOTÉ 3 QUESTION 1
A)
X + 25
X +
5
(X
+ 25) (2x - 15)
x x 25
25
*
*
*
*
2x
-15
2x
-15
2x
2x
=
+
-
75
15
=
-
15x
2
+
35x
-
375
2x2
-
2x
2
+
35x
50x
+
5) (2x + 75)
x x 5
5
2x2
- 15 x
50 x
-375
=
=
=
=
2x2
2x
(X +
2x
75
2x
75
=
=
=
=
2x
75x
10x
375
+
*
*
*
*
-
85x
=
2x
2
+
75x
+
10x
=
375
-
2x2
+
85x
+
375
-
375
50x
-
375
750
50x
50x
50
- x x VÉRIFICATION
X + 25
=
X +
5
-
15
15
-
+ 25
+ 5
10
10
2
2x
2x
+
-
2 (2 (-
15)
15)
+
-
-
30
30
+
-
75
15
50
= 15
=
- 15
75
15
=
0
0
750
750
75
15
=
=
=
=
=
375
-
10
10
=
-
45
45
-1 = -1
x
2x
+
-
3
7
-
2x x -
1
3
=
0
x
2x
+
-
3
7
-
2x x -
1
3
+
2x x -
x
2x
+
-
3
7
=
2x x -
1
3
(x
+
3) (x
-
3)
x x 3
3
*
*
*
*
x
-3
x
-3
B)
2 x -
=
=
=
=
3x +
2
3x
9
9
4x2
3x2
+
+
2
2 (-3)
-
= -16 ±
√
√
256 -6
ou
-16
-6
-16 +
-6
8
2x x -
1
3
4x2
2
4x
=
=
16x
16x
(4
- 7 =
- 16 =
-
2x
2x
-7
-7
-
16
+
(2x
2
= -16 ±
x1
0
=
9
-
=
x
-3 x
3x
-9
x2 x 1
3
4x2
* 2x =
* -1 = -2 x
-14 x
* 2x =
* -1 = 7
-
7) (2x -
2x 16x
0
0
+
+
7
8
192
+
8
-8 ou
-6
-24
-6
-4
-3
=
1,3333
ou
VÉRIFICATION
+
-
3
7
-
2x x -
1
3
=
0
4 +
2(4) -
3
7
- 2(4) 4 -
1
3
=
0
x
2x
7
a = -3 b = 16 c = -16
= -16 ±
-6
X -3 X - 16)
14x
1)
4
8
+
-
3
7
-
8
4
-
1
3
7
1
-
7
1
=
0
=
0
4
14x
C)
3