SOLUTION: Multiply (5y+2t-3)(3y+6t+15) Help please. I am not sure how I am supposed to do with this the best answer I have is (15y+12t-15)Do I still keep the parenthesis? Am I even close?

Question 231008: Multiply
(5y+2t-3)(3y+6t+15)
Help please. I am not sure how I am supposed to do with this the best answer I have is (15y+12t-15)Do I still keep the parenthesis? Am I even close? Probably not right?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(5y+2t-3)(3y+6t+15)
15y^2+30ty+75y+6ty+12t^2+30t-9y-18t-45
15y^2+12t^2+36ty+12t+66y-45