Question

find the root of the quadratic equation2x²+x+4​

Answer 1

2x

2

+x−4=0

Compairing with ax

2

+bx+c=0

a = 2 b = 1 c = -4

∴

2a

−b±

b

2

−4ac

=

2×2

−1±

1

2

−4×2(−4)

4

−1±

33

∴x=

4

−1+

33

OR x=

4

−1−

33