Respuesta :

Answer:

-11 - 25x

Step-by-step explanation:

Ver imagen kilah475

Answer: - 12x^2 - 25x +13

Step-by-step explanation: (3 -13x -7x2)-(5x2 +12x -10)   multiply the entire second term by negative one

3 - 13x -7x^2 -5x^2 -12x +10   combine like terms