Answer:
[tex]=6s^3-4s^2-9[/tex]
Step-by-step explanation:
[tex](4s^3 - 9s^2 - 7 ) + ( 2s^3 + 5s^2 - 2 )\\\mathrm{Remove\:parentheses}:\quad \left(a\right)=a\\=4s^3-9s^2-7+2s^3+5s^2-2\\\mathrm{Group\:like\:terms}\\=4s^3+2s^3-9s^2+5s^2-7-2\\\mathrm{Add\:similar\:elements:}\:-9s^2+5s^2=-4s^2\\=4s^3+2s^3-4s^2-7-2\\\mathrm{Add\:similar\:elements:}\:4s^3+2s^3=6s^3\\=6s^3-4s^2-7-2\\\mathrm{Subtract\:the\:numbers:}\:-7-2=-9\\=6s^3-4s^2-9[/tex]
Answer:
The answer is 6s^3 - 4s^2 -9
Step-by-step explanation:
