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Sagot :

Bonjour,

a)  Compléter:

f(x)= - 4x

f(-3)= -4(-3)= 12

f(5)= -4(5)= -20

b)  f(-3)= -4(-3)= 12= 12

c)  -4x= -20 => x= -20/-4= 5

d)  -4(-10)= 40

e)  -4x= -10 => x= -10/-4= 10/4= 2.5

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