Respuesta :

15x + 9 is the answer

7x - 4 + 8x + 5

add 4

7x + 8x + 9

7x + 8x is 15x

The answer will come out to 

15x + 9

The product of 7x-4 and 8x+5 = 56x² + 3x - 20

Products of two equations

7x-4 × 8x+5

Simplify,

= 7x (8x + 5) -4 ( 8x+5)

= 7x * 8x + 7x * 5 - 4 * 8x - 4*5

= 56x² + 35x - 32x - 20

= 56x² + 3x - 20

Therefore, the product of 7x-4 and 8x+5 = 56x² + 3x - 20

Learn more about simplified equations here:

https://brainly.com/question/432678