is it always true that the y-values of a quadratic function have opposite signs on either side of a zero of the function? Explain Please

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

You are assembling pieces of an iron gate to complete a fence. the finished gate will look like the one below. in order to assemble the gate it is important to under how the pieces are related. part 1: how are pies 1 and 2 in the archway related? part 2: how are the rectangular sections 5 and 6 in the center of the gate related to each other?

Put the equation in slope intercept form by solving for y