Ask Question
31 August, 17:38

Which of the following expressions is equal to 2x^ (2) + 8?

(2x-4i) (x+2i)

(2x-4i) (x-2i)

(2x+4i) (x+2i)

(2x-2i) (x+6i)

+5
Answers (1)
  1. 31 August, 17:44
    0
    The expression equal to 2x^ (2) + 8 is:

    First option (2x-4i) (x+2i)

    Step-by-step explanation:

    If we multiply

    (2x-4i) (x+2i) = (2x) (x) + (2x) (2i) - (4i) (x) - 4i (2i)

    (2x-4i) (x+2i) = 2x^ (1+1) + 4xi-4xi-8i^ (1+1)

    Simplifying:

    (2x-4i) (x+2i) = 2x^2-8i^2

    and i^2=-1, then:

    (2x-4i) (x+2i) = 2x^2-8 (-1)

    Multiplying:

    (2x-4i) (x+2i) = 2x^2+8
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Which of the following expressions is equal to 2x^ (2) + 8? (2x-4i) (x+2i) (2x-4i) (x-2i) (2x+4i) (x+2i) (2x-2i) (x+6i) ...” 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