Book Maths Puzzle Algebra

y=x2-8x+10 how do I solve and draw parabola?

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How can I use the equation y= -2x^2+3 with the quadratic formula? Could I also use factoring? The distance that an object falls from rest varies directly as the square of the time it has fallen. If the object fell 2 ft during the first half second, how far did it fall durin