Question

Find the discriminant for each equation. Describe the roots.
Give D, then the number of rational, irrational or complex roots. ( ex: 36, 2 rational)

x2 -16x +4 =0

Answer 1

Here's how to find the discriminant.

Answer 2

In this: x2 -16x +4 =0

a = 1, b = 16, and c = 4. So, what is the discriminant? Post what you get and we'll compare answers, okay?

After that, then this: Describe the number of rational, irrational or complex roots.

@sammyip

Answer 3

-123...most likely its wrong but i also tried on my calculator

Answer 4

(-16)^2 - 4 (1)(4) = ?

Answer 5

ok got it (240) but do you divide by 2??

Answer 6

We are not dividing by 2.

240 is the discriminant.

Answer 7

o alright sorry i must be thinking of something else then but im not sure about rational, irrational or complex

Answer 8

Is 240 a perfect square?

Answer 9

^^^^^ Read the chart.

Answer 10

no

Answer 11

Click on the chart and read over to see the number and type of roots.

Answer 12

so its 2 irrational

Answer 13

Correct, and I'd like you to do some reading at this attachment.

Answer 14

k thanks

Answer 15

You are welcome.