Armani1947 Armani1947
  • 04-08-2017
  • Mathematics
contestada

Which of the following is a solution of x^2 - 2x = -8?

Respuesta :

irspow
irspow irspow
  • 04-08-2017
x^2-2x=-8  add 1 to both sides

x^2-2x+1=-7  now the left side is a perfect square

(x-1)^2=-7  take the square root of both sides

x-1=±√-7  add 1 to both sides

x=1±√-7 which is

x=1±i√7  so

x=1+i√7 and 1-i√7
Answer Link

Otras preguntas

what is equivalent to 16/81
Jon ran around a track that was 1/8 of a mile long, He ran around the track 24 times. How many miles did Jan run in all
How did the integrated circuit effect the development of computers? It allowed computers to be freely programmed. It allowed the use of totally electronic compu
Which city within the same region has the highest population? St. Petersburg Moscow Minsk Kiev
How did the integrated circuit effect the development of computers? It allowed computers to be freely programmed. It allowed the use of totally electronic compu
Can some one please explain to me how to do these three problems so that I can do the rest of my home work. THANK YOU
____________ is the act or process of explaining the meaning of something. a. Nonverbal communication b. Verbal communication c. Observation d. Interpretation
What type of region was the Fertile Crescent and why?
can someone explain what's n+1-3n=-5+n+1-2
Suppose that a space shuttle weighs 4.5 million pounds at liftoff. What is the space shuttles weight in tons?