Answer:C
Step-by-step explanation:
=-[(5x^3+3x^2-7x)+(3x^3-5x^2-2)-(-9x^2+8)]
=-[(5x^3+3x^2-7x)+(3x^3-5x^2-2)+9x^2-8]
=-[(5x^3+3x^3)+(3x^2-5x^2+9x^2)-7x-(2+8)]
=-[8x^3+7x^2-7x-10]
= -8x^3-7x^2+7x+10
Answer:
lol
