Use the discriminant to describe the roots of each equation. then select the best description. x2 - 5x + 7 = 0 double root real and rational roots real and irrational roots non-real roots

D) non-real roots

Step-by-step explanation:

In the quadratic equation and

we know that the discriminant d = .

if d <0, then the roots are non-real roots

if d = 0, then double roots.

if d >0, then the roots are real and rational/irrational.

We are given

Here a = 1, b = -5 and c = 7.

Let's find the discriminant d =

d = 25 - 28

d = -3

Which is less than zero.

d < 0, so the roots are non-real according the definition stated above.

The answer is D) non-real roots

1/5^2 = 7.56/45

what?

step-by-step explanation:

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