ex 1
(3x)² = 3² * x² = 9x² (* = fois)
(5x)² = 5²*x² = 25x²
4x² = 2²*x² = (2x)²
9x² = 3²*x² = (3x)²
(9x)² = 9²*x²= 81x²
(6x)² = 6²*x²= 36x²
49x² = 7²*x²= (7x)²
36x² = 6²*x² = (6x)²
colonne de gauche on enlève les ( )
colonne de droite on met les ( )
ex 2
2*3x*4 = 2*3*4*x = 24x
7*4*2x = 56x
2*6x*3x = 2*6*3*x*x = 36x²
4*10x*6x = 4*10*6*x*x = 240x²
3*x*2x = 3*2*x*x = 6x²
x*8x2x = 8*2*x*x=16x²
