What is the discriminant of the polynomial below?
2х^2 + 5x - 8
a.31
b.-59
c.-39
d.89

Answer is D = 89

Step-by-step explanation:

Quadratic equation is given as:

Given Quadratic equation is

Comparing the equation, we get

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

Discriminant D is given as

Thus, Correct answer is D. 89

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

a. is correct