Explain what value or values of c make the equation x^2+12x+c=0 have 1 and only one solution ( justify the answer) so

Describe what moves you could use to create the transformation of the original image shown at right

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

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.