Question

Anyone know the correct answer? Attachment.

Answer 1

In this case you could use the quadratic formula to solve for x

Answer 2

you might attempt completing the square too

Answer 3

i got something like
x= 1/2(-9-\[\sqrt{85}\]
x=1/2 (\[\sqrt{85}\]-9)

Answer 4

Lol minus the huge gaps

Answer 5

\[x = -b \pm\ \frac{\sqrt{b^2 - 4* a * c}}{2a}\]

Answer 6

a = 1, b = 9, c = -1

Answer 7

Sorry, I'm just working it out

Answer 8

It's ok

Answer 9

Fine by me

Answer 10

\[x = \frac{-b \pm\ \sqrt{b^2 - 4* a * c}}{2a}\]

Answer 11

OK, \[x = \frac{-9 \pm\ \sqrt{9^2 - 4* 1 * (-1)}}{2*1}\] = \[x = \frac{-9 \pm\ \sqrt{85}}{2}\]

Answer 12

so \[x = (1/2)(-9 - \sqrt{85})\] and \[x = (1/2)(-9 + \sqrt{85})\]

Answer 13

so you got it!

Answer 14

Aha, ok :) Thanks a lot

Answer 15

thanks, any more questions?

Answer 16

Umm... Am I sposed to write that a certain way?

Answer 17

no, you could try simplifying the radical, \[\sqrt{85}\]

Answer 18

I just didn't know if i was sposed to write it in {} or something.