Shankar 7.5.2 answers in the back

[Irrelativity]

I was just wondering if it's an errecta:<P(t)> contains no i factor in front. Does this make sense to you guys since P is an operator there should be i but in the back of the book, there isn't.

EDIT: sorry guys it's 7.4.5 not 7.5.2.

EDIT: sorry guys I figured it out. Shankar was right.