Question

2x^2+x+4=0 find the roots by completing square method and please give reasons step by step ​

Answer 1

The ans of this question won't be a real number at any value. So I have converted it to complex no system. If you like my answer help me getting experience level.

Step-by-step explanation:

x^2+x/2+2=0

x^2+2*1/4 x + 1/16-1/16+2=0

(x+1/4)^2+31/16=0

x=-1/4 + i×root(31)

where

i^2=-1

Answer 2

Step-by-step explanation:

divide it by 2

x^+x+4=0

x^+x= -4

it because x cube

x to the power of 3 = -4

x =cube root of -4