The roots of a polynomial are the values that render the polynomial to zero
y=(x+4)(x-2)^2(x+7)
in the 1st parenthesis, x=-4 render the polynomial =0
in the 2nd parenthesis, x=2 render the polynomial =0
in the 3rd parenthesis, x=-7 render the polynomial =0
So there are 3 values as roots of this polynomial (answer C)
Step-by-step explanation:
All these fancy terms is confusing. We just need to substitute the original equations into the final problem statement.

We can then substitute 100 for x and solve.

It changed the world. It led to the Russian Revolution, the collapse of the German Empire and the collapse of the Hapsburg Monarchy, and it led to the restructuring of the political order in Europe and in other parts of the world, particularly in the Middle East.
I think it’s y=3x-1
I may be wrong but at least I tried