they went wrong in step 2, where they incorrectly set up their equations to solve. once you have factored a polynomial, for instance (x+6)(x-2) - you set each term equal to zero, not each term's inverse.
the correct answer would be,
x + 6 = 0
x = -6
x - 2 = 0
x = 2
x = -6 & 2
since the student decided to solve for each term's inverse, he did not get this answer.
57.09 minus 7.0435 equals
just subtrach them both and u get the answer of 50.0465
a. of(4) = g(4) and f(0) = g(0)
b. o f(-4) =...