If xy + z = x(y + z), whichof the following must be true?
x = 0 and z = 0
x = 1 and y = 1
y = 1 and z = 0
x = 1 or y = 0
x = 1 or z = 0
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xy + z = xy+xz xy必定等于xy 要使得等式must be true z=xz→ Z=0或X=1
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xy + z = xy+xz
xy必定等于xy
要使得等式must be true
z=xz→ Z=0或X=1
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