Respuesta :

(3x-5)(-x+4)

(3x)(-x)(3x)(4)(-5)(-x)(-5)(4)

-3x^ 2+12x+5x-20

-3x^2+17x-20

Answer: -3x^2+17x-20

Answer: -3x² +17x -20

Step-by-step explanation:

Hi, to solve this we have to apply distributive property.

To do this, we have to multiply each addend separately and then add the products.

(3x-5)(-x+4)  

(3x.-x) (3x.4) (-5.-x) (-5.4)

-3x² +12 x+5x-20

Adding alike terms to simplify (in this case 12x + 5x)

-3x² +17x -20

Feel free to ask for more if needed or if you did not understand something.