Activité 2 - Calcul algébrique : applications

a)
Réduis les expressions suivantes.

x . 4x =

x . 4 . x
4 . x . x
4 . x2
4x2

 

4.(3a + 2a) =
4 . 5a
20a
4a + 4a =
8a
2a . 3a =

2 . a . 3 . a
2 . 3 . a . a
6 . a2
6a2

 

2.(x + 3x) =
2 . 4x
8x
4a . 4a =
4 . a . 4 . a
4 . 4 . a . a
16 . a2
16a2
4a + 6a =
10a
4x . x . 2x =

4 . x . x . 2 . x
4 . 2 . x . x . x
8 . x3
8x3

 

x2 . 4x =
x2 . 4 . x
4 . x2 . x
4 . x3
4x3
x2 . 2x =

x2 . 2 . x
2 . x2 . x
2 . x3
2x3

 

2x + 2 . 3x =
2x + 6x
8x
4x2 + x2 =
5x2
a2 + a2 =
2a2
3x . x + x2 =
3x2 + x2
4x2
4x . 4 =
4 . x . 4
4 . 4 . x
16 .x
16x