Question 1199782
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    E^2 + 4*(E-1) = 56

    E^2 + 4E - 4 = 56

    E^2 + 4E = 56 + 4 = 60

    E^2 + 4E + 4 = 60+4 = 64

    (E+2)^2 = 64

     E + 2 = {{{sqrt(64)}}} = 8

     E = 8 - 2 = 6.


<U>ANSWER</U>.  Ethan is 6 years old.
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Solved.