SOLUTION: express your answer in simplest a+bi form: x^2 + 8x + 25 =0

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson  -> Lesson -> SOLUTION: express your answer in simplest a+bi form: x^2 + 8x + 25 =0      Log On


   

Question 551395: express your answer in simplest a+bi form:
x^2 + 8x + 25 =0
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
x%5E2%2B8x%2B25+=+0 Use the quadratic formula: x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F2a where a = 1, b = 8, and c = 25.
x+=+%28-8%2B-sqrt%288%5E2-4%281%29%2825%29%29%29%2F2%281%29 Evaluate:
x+=+%28-8%2B-sqrt%2864-100%29%29%2F2
x+=+%28-8%2B-sqrt%28-36%29%29%2F2
x+=+-4%2B3i or x+=+-4-3i