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Sagot :

LINA4161
ReBonjour,

A(x)= (x+2)^2
=x^2+ 2x*2 + 2^2
=x^2 + 4x + 4

B(x)= (x-7)^2
= x^2 - 2x*7 +7^2
=x^2 - 14x + 49

E(x)= 3x + 2(x-3)
= 3x + 2x - 2*3
= 5x - 6

F(x)= 4x -x(4-6x)
=4x - 4x + 6x^2
= 6x^2

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