SOLUTION: given that a*b =ab-b/a evaluate 4*8 and 2*(4*8)

Algebra ->  Expressions-with-variables -> SOLUTION: given that a*b =ab-b/a evaluate 4*8 and 2*(4*8)      Log On


   

Question 909959: given that a*b =ab-b/a evaluate 4*8
and 2*(4*8)
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Just substitute according to your rule.

Your second expression will need applying your rule two time.
... Or just use what you found from the first expression for the parenthesized part of the second expression.

%284%29%288%29-8%2F4=32-2=30

Now you want to find 2*(4*8)=2*30
2*30=(2)(30)-30/2=60-15=45