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Hi !

f(x) = 5x - 2

g(x) = 4 - x^2

(a)

(fog)(x) = 5(4 - x^2) - 2

= 20 - 5x^2 - 2

= - 5x^2 + 18

(b)

(gof)(x) = 4 - (5x - 2)^2

= 4 - (25x^2 + 4 - 20x)

= 4 - 25x^2 - 4 + 20x

= - 25x^2 + 20x

= - 5x(5x - 4)

my program is saying this is an exact answer

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