Question

What is the discriminant D of the equation? n^2+2n−2=0

Answer 1

Answer: D=12

Explanation:

Answer 2

the discriminant of the given equation is, 12

Explanation:

A quadratic equation
`ax^2+bx+c=0` ....[1] then

Discriminant of the quadratic equation is given by:

`D=b^2-4ac`

where D is the discriminant of the quadratic equation

Given the equation:

`n^2+2n-2=0`

On comparing with equation [1] we have;

a = 1, b = 2 and c = -2

Then using formula for discriminant, we have;

`D=2^2-4(1)(-2)`

⇒
`D=4+8`

⇒
`D = 12`

Therefore, the discriminant of the given equation is, 12