Question

2x²+2x-4=0 answer this questions ​

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

Answer 2

it can be done by factorization method.

2x^2+2x-4=0

2x^2+4x-2x-4=0

2x(x+2)-2(x+2)=0

(2x-2)(x+2)

2x-2=0 or x+2=0

2x=2. x=-2

x=1

hence x=1,-2