SOLUTION: the equation {{{1.9x^2+3.2x+7.8=0}}} has the solution of x=__ and plus and minus ___ ___.

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: the equation {{{1.9x^2+3.2x+7.8=0}}} has the solution of x=__ and plus and minus ___ ___.      Log On


   

Question 16423: the equation 1.9x%5E2%2B3.2x%2B7.8=0 has the solution of x=__ and plus and minus ___ ___.
Answer by venugopalramana(3286) About Me  (Show Source):
You can put this solution on YOUR website!
FOLLOW THE METHOD GIVEN BELOW......
x%5E2-4x%2B8=0 x=__ Plus __ and minus__.
using the formula x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ we get
x+=+%28-%28-4%29+%2B-+sqrt%28%28-4%29%5E2-4%2A1%2A8%29%29%2F%282%2A1%29+
x+=+%284%2B-+sqrt%28-16%29%29%2F2
(2+2i) OR ( 2-2i )
+(2+2i) OR - (2i-2)