Sagot :
Bonjour,
G = (2 x - 5)(4 x + 1)
2x*4x = 8x²
2x*1 = 2x
-5 * 4x= -20x
-5*1 = -5
=>
8x² +2x -20x -5 = 8x² -18x -5
Réponse:
Bonjour,
G = (2 x - 5)(4 x + 1)
=2x*4x+2x*1+(-5)*4x+(-5)*1
=8x²+2x-20x-5
=8x²-18x-5
Bonjour,
G = (2 x - 5)(4 x + 1)
2x*4x = 8x²
2x*1 = 2x
-5 * 4x= -20x
-5*1 = -5
=>
8x² +2x -20x -5 = 8x² -18x -5
Réponse:
Bonjour,
G = (2 x - 5)(4 x + 1)
=2x*4x+2x*1+(-5)*4x+(-5)*1
=8x²+2x-20x-5
=8x²-18x-5