Register

Which of the following expressions is equal to -×^2-81? A. (-x+9i)(x-9i) B.(x+9i)(x-9i) C.(-x-9i)(x-9i) D.(-x-9i)(x+9i)

Which of the following expressions is equal to -×^2-81? A. (-x+9i)(x-9i) B.(x+9i)(x-9i) C.(-x-9i)(x-9i) D.(-x-9i)(x+9i)
asked 214k views
4 votes
Which of the following expressions is equal to -×^2-81?

A. (-x+9i)(x-9i)
B.(x+9i)(x-9i)
C.(-x-9i)(x-9i)
D.(-x-9i)(x+9i)

asked
User Berrberr
by
8.4k points

1 Answer

5 votes

-x^2-81=-(x^2+81)=-(x^2-(9i)^2)=-(x+9i)(x-9i)=(-x-9i)(x-9i)\to C.
answered
User Johndeu
by
7.8k points
← Prev Question Next Question →

No related questions found

Ask a Question
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.

Categories

Other Questions

How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
Link Copied!