SOLUTION: Please help! Multiply (-3n)^2(4n^9)^2 I worked through this and came up with 144n^20, but that number seems really high. Can anyone tell me if I am on the right track? Thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Please help! Multiply (-3n)^2(4n^9)^2 I worked through this and came up with 144n^20, but that number seems really high. Can anyone tell me if I am on the right track? Thank you      Log On


   

Question 303475: Please help!
Multiply (-3n)^2(4n^9)^2
I worked through this and came up with 144n^20, but that number seems really high. Can anyone tell me if I am on the right track?
Thank you!
Found 3 solutions by stanbon, jim_thompson5910, richwmiller:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You are correct.
Cheers,
Stan H.

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
You are correct in saying that %28-3n%29%5E2%2A%284n%5E9%29%5E2=144n%5E%2820%29. The number is only that high because you essentially have 2 pairs of 9 'n's being multiplied (18 total so far) plus 2 more 'n's to throw in.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
it is fine
-3*-3*4*4 is the same as 12*12=144
9+9+2=20