if xy+z=x(y+z) which of the following must be true?
if xy+z=x(y+z) which of the following must be true?
Answer/Solution
x=1 or z=0
Steps/Work
xy+z=xy+xz
z=xz
xz-z=0
z(x-1)=0
Means;
either z=0
OR
x-1=0 i.e. x=1
Answer B
z=xz
xz-z=0
z(x-1)=0
Means;
either z=0
OR
x-1=0 i.e. x=1
Answer B