Rewrite the equation in vertex form by completing the square.
f(x)=(3x-9)(x+1)

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

W-16=-12 solve each one step equation plz

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12