SOLUTION: (3a - 5)^2
=(3a)^2 + 5(3a)(-5)+ (-5)^2
=9^2 - 30a + 25
where in this equation does the 30a come from?
Algebra.Com
Question 45514: (3a - 5)^2
=(3a)^2 + 5(3a)(-5)+ (-5)^2
=9^2 - 30a + 25
where in this equation does the 30a come from?
Answer by adamchapman(301) (Show Source): You can put this solution on YOUR website!
Use FOIL: (get the product of the firsts, then add the product of the outers, then add the product of the inners and then add the product of the lasts:)
The answer is:
I hope this helps.
Adam
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