SOLUTION: Multiply and show all your steps. Problem: (7-a) (4-3a) I am very confused with these, they look simple, but I sure mess them up.

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Multiply and show all your steps. Problem: (7-a) (4-3a) I am very confused with these, they look simple, but I sure mess them up.      Log On


   

Question 627304: Multiply and show all your steps.
Problem: (7-a) (4-3a)

I am very confused with these, they look simple, but I sure mess them up.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%287-a%29%284-3a%29

7%284-3a%29-a%284-3a%29

28-21a-4a%2B3a%5E2

28-25a%2B3a%5E2

3a%5E2-25a%2B28

So %287-a%29%284-3a%29 multiplies out to 3a%5E2-25a%2B28

In other words, %287-a%29%284-3a%29=3a%5E2-25a%2B28 for all values of 'a'.

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