Exercice 1 Développer et réduire les expressions littérales suivantes ;
A=(3x + 7)² - 54x - 8x²
B= -(5 - x )² +3x² + 25
Exercice 2
C=36x² + 48x + 16
D=25 - 64x²
E=4x² - 20x + 25 - 3(2x - 5)(x - 3) + (2x - 5)
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