Respuesta :

2x * 3x = 6x^2

6x^2

2x * 3 = 6x

6x^2 + 6x

5 * 3x = 15x

6x^2 + 6x + 15x

6x^2 + 21x

5 * 3 = 15

6x^2 + 21x + 15

The answer is 6x^2 + 21x + 15.