Question

What is the discriminant of the polynomial below?

2х^2 + 5x - 8
A.31
B.-59
C.-39
D.89

Answer 1

Answer: Answer is D = 89

Explanation:

Quadratic equation is given as:
`ax^(2) + bx + c = 0`

Given Quadratic equation is
`2x^(2) + 5x -8 = 0`

Comparing the equation, we get

a=2, b=5, c= -8

Discriminant D is given as
`D =b^(2) -4ac`

`D = 5^(2) -4(2)(-8)`

`D = 25+64`

`D =89`

Thus, Correct answer is D. 89