contestada

need help asap!!

(3x3 - 5x2 + 4x - 9) - (7x3 - 8x2 - 5x + 10)

a. 10x3 + 3x2 + 9x - 19

b. -4x3 - 10x2 + 9x - 19

c. 10x3 - 13x2 - x + 1

d. -4x3 + 3x2 + 9x - 19

Respuesta :

Chelboy

Answer:D

Step-by-step explanation:

(3x^3 - 5x^2 + 4x - 9)-(7x^3 - 8x^2 - 5x + 10)

open brackets

3x^3 - 5x^2 + 4x - 9 - 7x^3 + 8x^2 +5x - 10

Collect like terms

3x^3-7x^3-5x^2+8x^2+4x+5x-9-10

-4x^3+3x^2+9x-19