Can someone me out with this question? ?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

Two numbers have a sum of -19. one number is x. what expression represents the other number?