ExpressionsEquivalentNot Equivalent$-pq\ +\ r\ +\ 5$−pq + r + 5​

Question

$-pq\ -\ pr\ -\ 5p$−pq − pr − 5p​

$-pq\ -\ p\left(r\ +\ 5\right)$−pq − p(r + 5)​

$p\left(q\ -\ r\ -\ 5\right)$p(q − r − 5)​

$p\left(-q\ -\ r\right)\ -\ 5p$p(−q − r) − 5p​

$p\ -\ \left(q\ +\ r\ +\ 5\right)$p − (q + r + 5)​

Answer 1

-5p + r - pq單位