One of your friends is taking another mathematics course and tells you "I know that the expression $\log _{2}(-4)$ is undefined because the definition says that for any expression of the form $\log _{a} x, x$ can't be 0 and it can't be negative, but I don't understand why this is true." Write an explanation for your friend.

Question

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The Answer of One of your friends is taking another mathematics course and tells you "I know that the expression $\log _{2}(-4)$ is undefined because the definition says that for any expression of the form $\log _{a} x, x$ can't be 0 and it can't be negative, but I don't understand why this is true." Write an explanation for your friend.

One of Your Friends Is Taking Another Mathematics Course and Tells