binomial theorum and pascal's triangle – Khan Academy Help Center - German

Wie können wir helfen?

learn

1. Mai 2017 14:39

0

(-p+q)^5

my answer was -p^5 + 5p^4q - 10p^3q^2 + 10p^2q^3 - 5pq^4 -q^5

but the answer for the question was listed with the last term +q^5

My question is why isn't it -q^5 for the last term? Isn't it really -p^0(q^5)?

Isn't -p^0 = -1?

Neuer Post

1 Kommentar

Amin

4. Juli 2017 14:22

Bearbeitet
0

Aktionen für Kommentare Permalink
When you evaluate the binomial using Pascal's triangle, you have to remember to substitute the terms and their signs within parentheses.

So, while the statement -p^0 = -1 is true, it is used incorrectly here. You have to include the "-" sign when raising p to the 0 power, (-p)^0 = 1.

Post ist für Kommentare geschlossen.