Question
Subtract:
$-7 p^2 q$ r from $-3 p^2 q r$.
$-7 p^2 q$ r from $-3 p^2 q r$.
✓
Answer
We have,
$-3 p^2 q r-\left(-7 p^2 q r\right)$
$=-3 p^2 q r+7 p^2 q r$
$=p^2 q r(-3+7)$
$=4 p^2 q r$
${[\therefore \text { with - ve sign }+ \text { ve sign will be change }]}$
$-3 p^2 q r-\left(-7 p^2 q r\right)$
$=-3 p^2 q r+7 p^2 q r$
$=p^2 q r(-3+7)$
$=4 p^2 q r$
${[\therefore \text { with - ve sign }+ \text { ve sign will be change }]}$
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