Ask Question
30 November, 11:02

If f (x) = 4x3+3x2-5x+20 and g (x) = 9x3-4x2+10x-55, what is (g-f) (x) ?

A) 5x3-7x2+15x-75

B) 5x3+x2+5x+35

C) 13x3-x2+5x-35

D) - 5x3+7x2-15x+75

+2
Answers (1)
  1. 30 November, 11:20
    0
    Step-by-step explanation:

    (g-f) (x) = 9x³ - 4x² + 10x - 55 - [ 4x³ + 3x² - 5x + 20]

    To remove the parenthesis, take - inside, multiply f (x) by - 1

    = 9x³ - 4x² + 10x - 55 - 4x³ - 3x² + 5x - 20

    Now, bring like terms together,

    = 9x³ - 4x³ - 4x² - 3x² + 10x + 5x - 55 - 20

    = 5x³ - 7x² + 15x - 75
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “If f (x) = 4x3+3x2-5x+20 and g (x) = 9x3-4x2+10x-55, what is (g-f) (x) ? A) 5x3-7x2+15x-75 B) 5x3+x2+5x+35 C) 13x3-x2+5x-35 D) - ...” 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