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

solve for missing sides of a right triangle using the pythagorean theorem of 6 and 11 and x
How does an offspring of a mushroom or mold (asexual reproduction) compare to its parent?
which one is bigger 9 and 5/10 or 9 and 5/9
Do you hear sounds around you as one frequency at a time or as many frequencies at once? Plz help
How did Mansa Musa affect the Mali Empire?
how do you know the text is fantasy?
Mario is heavily addicted to smoking but wants to quit. What can he use to reduce the painful effects of withdrawal? a: nicotine gum b: smokeless tobacco c: pa
how do light dependent generates high electrons
Which equation shows the substitution method being used to solve the system of linear equations? x – y = 7 x = y + 3 A. (y + 3) – y = 7 B. x = (7 – x) + 3
Choose the correct simplification of the expression (5xy5)2(y3)4.