Sagot :
a)3(2x+4)=3*2x+3*4=6x+12
b)7(2-3y)=7*2-7*3y=14-21y
c)5(1+4x)=5*1+5*4x=5+20x
d)8(2y-5)=8*2y-8*5=16y-40
b)7(2-3y)=7*2-7*3y=14-21y
c)5(1+4x)=5*1+5*4x=5+20x
d)8(2y-5)=8*2y-8*5=16y-40