SOLUTION: What is the answer to 5(2x-3y)^2? I know the answer is 20x^2-60xy+45y^2 but I keep getting 20x^2-45y^2! How do you get the right answer? Thanks

Algebra ->  Trigonometry-basics -> SOLUTION: What is the answer to 5(2x-3y)^2? I know the answer is 20x^2-60xy+45y^2 but I keep getting 20x^2-45y^2! How do you get the right answer? Thanks      Log On


   

Question 133674: What is the answer to 5(2x-3y)^2?
I know the answer is 20x^2-60xy+45y^2 but I keep getting 20x^2-45y^2!
How do you get the right answer?
Thanks
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
you FOIL the binomial

(2x-3y)(2x-3y)=4x^2-6xy-6xy+9y^2=4x^2-12xy+9y^2

multiplying by 5 __ 20x^2-60xy+45y^2