SOLUTION: whats the answer to (2y-3) 2nd power

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Question 400769: whats the answer to (2y-3) 2nd power
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
%282y-3%29%5E2
The First way:
Use FORMULA %28a-b%29%5E2=a%5E2-2%2Aa%2Ab%2Bb%5E2
%282y-3%29%5E2=%282y%29%5E2-2%2A%282y%29%2A3%2B3%5E2=4y%5E2-12y%2B9
.
The Second way
If you didn't study that formula yet, you can use a%5E2=a%2Aa