Use the discriminant to describe the roots of each equation. then select the best description.
x2 - 5x - 4 = 0
double root
real and rational root
real and irrational root
imaginary root

Real and irrational root

Step-by-step explanation:

Since a quadratic equation ,

Has two real different roots,

If the value of discriminant

Has two equal real roots,

If

Has two imaginary roots,

If

Here, the given equation,

Hence, the equation has the two unequal real roots,

Now, √D is an irrational number ( Which can not be expressed in the form of p/q in which q≠0 )

Therefore, the given equation has real and irrational root,

Third option is correct.

the infinity sign

step-by-step explanation:

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.