Olivia is putting decorations around a picture frame

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.

State one method by which you can recognize a perfect square trinomial.

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work