i need someone to do this for me, my teacher says i should work this out and should come out with the answer 10, because the difference between the two numbers is 10 apparently, so if anybody manages to do this, could u please explain how u did this bcoz i have other ones to do aswell .
ok it was origionally n(n+11) - (n+11) x (n+10) but i worked that out to be n2 +11n - n2 - 11 - 1n - 10n but now i dont know how to work it out to get the answer 10, the nswer has to be ten bcoz my teacher told me. but she cant tell me too much bcoz its for coursework.
2007-04-12 09:34:30 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
n(n+11) - (n+11) x (n+10) = {n - (n + 10)}(n + 11) = -10n - 110
2007-04-12 09:58:50 · answer #1 · answered by John S 6 · 0⤊ 0⤋
Let' s do it step by step:
n(n+11) = n^ 2 + 11n
For the next part, we use the FOIL RULE:
(n+11)(n+10) = n^2 +10n +11n +110
Subtracting,
the final result is
-10n - 110 = -10(n+11).
You and your teacher are both off somewhere.
Are you both working the same problem?
2007-04-12 16:54:11 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋