It would be (-5, 15) or b.
Hope this helps!
the equation is y=mx+b and when you plug in the numbers it would be y=2x+3
You first simplify the expression using PEMDAS
-2x^3-10x^2+2x^3-10x^2+x
then combine like terms,
(-2x^3+2x^3), (-10x^2-10x^2), x
cancels out^
so the answer would be -20x^2+x
I'm sorry my friend but I need as much help as you do I'm just answering this so I can get some help sorry