so.. check what value the discriminant is then.
Find the lateral and total surface area of the rectangular
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so.. check what value the discriminant is then.
those are the vertex form of a parabola... so hmmm
the vertex of this one is at 0,1 and intercepts or "solutions" are at -1 and 1, so is opening downwards, notice the picture below
that means, the squared variable is the "x", thus the form is
now, we know the vertex is at 0,1, and two x-intercepts of
thus
solve for "a", to see what that coefficient is, then plug it back in the vertex form equation
