Sagot :
bonjour
A=(4+4k)(2+3b+4a)
A = 8 + 12 b + 16 a + 8 k + 12 bk + 16 ak
A = 16 a + 12 b + 16 ak + 12 bk + 8
A=(4*2+4*3b+4*4a)+(4k*2+4k*3b+4k*4a)
A=8+12b+16a+8k+12kb+16ka
A=16a+12b+8k+16ka+12kb+8
A=8+12b+16a+8k+12kb+16ka
A=16a+12b+8k+16ka+12kb+8