How do you multiply #(np-1)(np-1)#?

1 Answer
smendyka
Nov 5, 2016

#n^2p^2 - 2np + 1#

Explanation:

Step 1) Multiple the first element (#np#) in the left term by the right term.

#np(np - 1) => np*np - np => n^2p^2 - np#

Step 2) Multiple the second element (#-1#) in the left term by the right term.

#-1(np - 1) => -np + -1*-1 => -np + 1#

Step 3) Add these two results together

#n^2p^2 - np -np + 1 => n^2p^2 - 2np + 1#

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