Question

According to Boolean algebra theorems $x\cdot x$ is equal to

• A. $x$
• B. $1$
• C. $0$
• D. $x^{\prime }$

Answer 1

The correct option is A $x$

Let proof by boolean algebra using truth table

x x x.x

T T T

F F F

So according to Truth table output of $x.x$ is $x$