9x×5x+15x

To simplify the expression 9x * 5x + 15x, we need to apply the distributive property and combine like terms.

First, let's multiply 9x by 5x: 9x * 5x = 45x^2

Now, let's add 15x to the result we obtained: 45x^2 + 15x

Therefore, 9x * 5x + 15x simplifies to 45x^2 + 15x.