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Sagot :

Explications étape par étape:

1. on remplace x par -3

A(-3) = (2×(-3)-3)(-5+2×(-3))-4+6×(-3)

A(-3) = (-6-3)(-5-6)-4-18

A(-3)= -9×(-11)-4-18

A(-3) = 99-4-18

A(-3) = 77

2. A(x)= (2x-3)(-5+2 x) -4+6x

A(x) = -10x + 4x² +15 -6x -4 +6x

A(x) = -10x +4x² +11

voila si tu as des questions n hesite pas

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