Can someone help me with this

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick

Which of the following graphs could represent a cubic function?