anonymous
  • anonymous
Which of the following is a solution of x2 + 4x = −8? x = −2 − 2i x = 2 + 2i x = −4 + 4i x = 4 − 4i
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
helppp plzzz
anonymous
  • anonymous
solving a quadratic equation is easy , you can do it by either splitting the middle term (in this case its not possible since the roots/ solution is not real) so you have to solve it by finding he discriminant write the equation in the form of \[ax ^{2}+bx+c=0\] where a is the coefficient of x^2, b is the coefficient of x and c is the constant term discriminant is given by : \[D=b ^{2}-4ac\] now to find the value of x we use the equation: \[x=(-b \pm \sqrt{D})/2a\]
anonymous
  • anonymous
so its C

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
no it would be A
anonymous
  • anonymous
see D=(4)^2-4(1)(8) =16-32 =-16 so x=(-4-sqrt(D))/2(1) and (-4+sqrt(D))/2(1) =(-4-sqrt(-16))/2 and (-4+sqrt(-16))/2 =(-4-4i)/2 and (-4+4i)/2 so the two solutions are: -2-2i and -2+2i

Looking for something else?

Not the answer you are looking for? Search for more explanations.