Please help! Image of problem below

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

If using the method of completing the square to solve the quadratic equation x 2 + 16 x + 24 = 0 x 2 +16x+24=0, which number would have to be added to "complete the square"?

Dange measures and finds that she can do a vertical jump that is 27.5% of her height if dange is 48 inches tall how high can she jump