Afunction and its tangent line at the point b =(3.6,7) . if the point a on the tangent line is (3.58,7.02) , fill in the blanks below to complete the statements about the function at the point .
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The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?