Sagot :
Bonjour,
R= (30z -18) -( 4z -6z +12z -18)
R= 30z -18 - 4z +6z -12z +18
R= 20z
bonjour
R = 6 ( 5 z - 3 ) - ( z + 3 ) ( 4 z - 6 )
R = 30 z - 18 - ( 4 z² - 6 z + 12 z - 18)
R = 30 z - 18 - 4 z² + 6 z - 12 z + 18
R = - 4 z² +24 z
Bonjour,
R= (30z -18) -( 4z -6z +12z -18)
R= 30z -18 - 4z +6z -12z +18
R= 20z
bonjour
R = 6 ( 5 z - 3 ) - ( z + 3 ) ( 4 z - 6 )
R = 30 z - 18 - ( 4 z² - 6 z + 12 z - 18)
R = 30 z - 18 - 4 z² + 6 z - 12 z + 18
R = - 4 z² +24 z