Question

2xsq+x-4=0 by completing square method​

Answer 1

Answer:

multiply by 2

4x^2 + 2x - 8 = 0

(2x)^2 + 2x -8

2*2x*b = 2x

b=1/2

b^2 = 1/4

(2x)^2 + 2x -8 +1/4- 1/4

(2x)^2 + 2x + (1/2)^2 - 33/4

(2x+1/2)^2 - (√33/2)^2

(2x + 1/2+√33/2)

(2x + 1/2-√33/2)