SOLUTION: who do you solve this problem multiplying polynomials (n-7)(3n+1)

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Question 920688: who do you solve this problem multiplying polynomials
(n-7)(3n+1)
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
The two ways are either Distributive Property, or Lattice Multiplication Arrangement.

Distributive Property works according to highlight_green%28w%28x%2By%29=wx%2Bwy%29. Use this fact if you want. If you choose it, you will need to apply the property two times. The result will be consistent with the lattice method.


LATTICE METHOD

______________n__________-7
_
__3n________3n^2_______-21n
_
__1__________n_________-7

Sum the inner cells.
highlight%283n%5E2-20n-7%29

Answer by MathTherapy(10556) About Me  (Show Source):
You can put this solution on YOUR website!

who do you solve this problem multiplying polynomials
(n-7)(3n+1)


Use FOIL to expand, if you've already learnt it!!