The functions f(x) and g(x) are defined below. f(x)= 21x^2 + 13x - 20 g(x)= -3x - 4 which expression is equal to f(x) ÷ g(x)?

For this case we have the following polynomials:
 
 To divide the polynomials we must follow the following steps:
 1) Same base, the exponents are added.
 2) Only terms that have the same exponent can be added or subtracted.
 3) If the remainder is zero, the division is exact.
 
 
 Note: see attached image for the solution.