Ask Question
10 December, 18:07

Let f (x) = x²+3x-4 and g (x) = x+5 Find f (x) • g (x)

A) x³+3x²+16x-20

B) x³+5x²+14x-20

c) x³+8x²+11x-20

D) x³+9x²+19x-20

+1
Answers (2)
  1. 10 December, 18:30
    0
    The correct option is C.

    Step-by-step explanation:

    Given:

    f (x) = x²+3x-4 and g (x) = x+5

    We have to find f (x) • g (x)

    In this question simply multiply the functions:

    (x²+3x-4) (x+5)

    Multiply each element of 2nd bracket with the every element of first bracket.

    = x (x²+3x-4) + 5 (x²+3x-4)

    = x^3+3x^2-4x+5x^2+15x-20

    Now solve the like terms:

    = x^3+8x^2+11x-20

    Thus the correct option is C ...
  2. 10 December, 18:34
    0
    c) x^3 + 8x^2 + 11x - 20.

    Step-by-step explanation:

    f (x). g (x) = (x + 5) (x^2 + 3x - 4)

    = x (x^2 + 3x - 4) + 5 (x^2 + 3x - 4)

    = x^3 + 3x^2 - 4x + 5x^2 + 15x - 20 Simplifying like terms:

    = x^3 + 8x^2 + 11x - 20.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Let f (x) = x²+3x-4 and g (x) = x+5 Find f (x) • g (x) A) x³+3x²+16x-20 B) x³+5x²+14x-20 c) x³+8x²+11x-20 D) x³+9x²+19x-20 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers