Bonjour
♧ Exos 5 :
A = (10x+8)(10x-8)
A = (10x)² - 8²
A = 100x² - 64
B = (6x+6)²
B = (6x)² +2×6x×6 + 6²
B = 36x² + 72x + 36
C = (3x-4)²
C = (3x)² -2×3x×4 + 4²
C = 9x² - 24x + 16
♤ Tu termines .....
♧ Exos 6 :
A = (9x+3)²
A = (9x)² + 2×9x×3 + 3²
A = 81x² + 54x + 9
B = (4x-8)(8x+4)
B = 32x² + 16x - 64x - 32
B = 32x² -48x - 32
C = (10x+8)(10x-8)
C = (10x)² - 8²
C = 100x² - 64
♤ Tu termines. ..
Voilà ^^