When 8x^2+3x+2 is subtracted from 9x^2-3x-4 what’s the answer

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

Anyone know? is appreciated! will mark brainliest if correct!

Ineed to know the answer to this algebra question.