HELP ME PLS (6y2 - 4y + 1) - (2y2 - 2y -7)

a
4y^2 -6y - 6
b
4y^2 -2y + 6
c
4y^2 - 2y + 8
d
4y^2 - 6y + 8

Which best describes the strength of the correlation, and what is true about the causation between the variables? it is a weak negative correlation, and it is not likely causal. it is a weak negative correlation, and it is likely causal. it is a strong negative correlation, and it is not likely causal. it is a strong negative correlation, and it is likely causal.

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Which expression is not a polynomial?