SOLUTION: Evaluate f(x)= -7x , g(x)= 4x-2 , h(x)= 2x^2 a.) (h-f)(x) b.) (gh)(x) c.) (foh)(-2) The ones that you have to input the exponents are throwing me are confusing. Tha

Question 1036101: Evaluate
f(x)= -7x , g(x)= 4x-2 , h(x)= 2x^2
a.) (h-f)(x)
b.) (gh)(x)
c.) (foh)(-2)
The ones that you have to input the exponents are throwing me are confusing.
Thank you
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
f(x)= -7x , g(x)= 4x-2 , h(x)= 2x^2
:
a.) (h-f)(x) = 2x^2 - (-7x) = 2x^2 + 7x = x(2x+7)
:
b.) (gh)(x) = (4x-2)(2x^2) = 8x^3 - 4x^2 = 4x^2(2x-1)
:
c.) (foh)(-2) = -7(2x^2) = -14x^2 = -14(-2)^2 = -56
:
note that foh means apply h fuction first then apply the f function
:

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