Question

What is the discriminant of the quadratic equation 2x + 5x2 = 1?

–18
–16
22
24

Answer 1

24

Explanation:

From this equation the value of a=5, b= 2 and c=-1

Now we plug in the values in the formula

Answer 2

24

Explanation:

the discriminant of the quadratic equation
`2x + 5x^2 = 1`

Write the equation in the form of ax^2 +bx+c=0

`2x + 5x^2-1=0`

`5x^2+2x-1=0`

To find out discriminant we use formula

`b^2-4ac`

From the given equation the value of a=5, b= 2 and c=-1

Now we plug in the values in the formula

`b^2-4ac=2^2-4(5)(-1)=24`