Sorry it took so long, here is your answer:
4 and -2.5
You can get this by first factoring the equation.
(2x + 5)(x - 4)
Then set both equal to zero and solve individually.
answer:
A) The angles EA and AG are not congruent.
B) m∠F = 90°
m∠E + m∠F = 180°
90 ° + x = 180° (subtract)
x = 90°
C) Both ∠HEF and ∠AGF are congruent becuase they both have the same angle. Try and measure it using a protractor.