Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 5 = 4x

Thus, the two root of the given quadratic equation    is 5 and -1 .

Step-by-step explanation:

Consider, the given Quadratic equation,

This can be written as ,  

We have to solve using quadratic formula,

For a given quadratic equation we can find roots using,

 ...........(1)

Where,   is the discriminant.

Here, a = 1 , b = -4 , c = -5

Substitute in (1) , we get,

and

and

and

Thus, the two root of the given quadratic equation is 5 and -1 .

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

step-by-step explanation:

the answer is 128