SOLUTION: Mulitiply. ( r + 1/5)(r+1/3)

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Question 380704: Mulitiply.
( r + 1/5)(r+1/3)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi,

Mulitiplying 

Note: 1/5 = 3/15  and 1/3 = 5/15

( r + 1/5)(r+1/3) = (r + 3/15)(r + 5/15)

 r^2 + (8/15)r + 1/15 

Note:SUM of the inner product(3/15)r and the outer product(5/15)r = (8/15)r