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Sagot :

HIRONDELLE52

Bonjour,

A=

3x +5

x= 3

9+5 = 14

x= -2

-6 +5  =1

B=

8-2x

x= 3

8 -6= 2

x= -2

8+4 = 12

C=

8x -12

x= 3

24-12 = 12

x= -2

-16 -12 = 4

D=

4x² -4x

x= 3

4*9 - 4*3=  36-12 = 24

x= -2

16 + 8 = 24

E= (5x-3)* 2x = 10x² -6x

x= 3

10*9 -6*3 = 90-18 = 72

x= -2

40 +12 = 52

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