so I did the truth table as follows:

XZ =

X Z X&Z

0 0 0

0 1 0

1 0 0

1 1 1

and ( x + y ) ( x+y' ) ( x' + z ) as follows:

0 | 0 | 0 | 0 0 1 1 0

0 | 0 | 1 | 0 0 1 1 0

0 | 1 | 0 | 1 0 0 0 0

0 | 1 | 1 | 1 0 0 0 0

1 | 0 | 0 | 1 1 1 1 0

1 | 0 | 1 | 1 1 1 1 1

1 | 1 | 0 | 1 1 1 0 0

1 | 1 | 1 | 1 1 1 0 1

is that correct?

Also the identities are as follows:

XX+XX+YX+YY+YZ+XX+XZ+YX+YZ ;Distributive

XX+(XX)+YX+(YY)+YZ+(XX)+XZ+YX+YZ ; Associative

XX+YX+YZ+XZ+YX+YZ ; Inverse

and I'm stuck. Can anyone direct me to teach me how to do this... I read alot of articles but I dont understand much for it. Thanks!