Question

Solve by using the quadratic formula. Approximate the solutions to the nearest thousandth.
x2 − 6x − 5 = 0

Answer 1

x = [ -b ± sqrt(b^2 - 4ac) ] / 2a
from your equation:
a=1,b=-6 and c=-5

Answer 2

yes I got that. And I try and solve it but can't get the answer.

Answer 3

x=-0.74166 or 6.74166

Answer 4

now how did u get those answers? last step i knew how to do was.. -6+- sqrt(56) /2

Answer 5

are you helping me still??

Answer 6

yes at the last step, you'll obtain a solution like -6+sqrt(56)/2 and -6-sqrt(56)/2

Answer 7

ok then what do I do next?

Answer 8

okay, sqrt(56)=7.4833

Answer 9

so now we have (-6+7.7833)/2 =0.74166

Answer 10

how is that negative though?

Answer 11

thats not the answer I got when I divided it by 2

Answer 12

that last solution will be (-6-7.4833)/2=-6.74166

Answer 13

and how did u get those? doesnt make any sense to me

Answer 14

don't divide just the sqrt(56) by 2. it's the whole (-6+sqrt56) divided by 2

Answer 15

so you take -6+7.7833 and divide that by 2. when I do that I dont get the answer you get.

Answer 16

and for the second one how did u get 7.4833?

Answer 17

sqrt(56)=704833

Answer 18

you mean: 7.4833

Answer 19

yes

Answer 20

I understand now never mind. but when I put the answers in it is saying that -0.74166 and 6.74166 how is that?

Answer 21

i'm typing to different people so pardon the typo

Answer 22

i dont understand how the first one is negative and the second one is positive when i figure it out its the other way around

Answer 23

your answers will be -0.74166 and 6.74166 because you first the quadratic formula is b plus or minus whatever follows it

Answer 24

do you mean you got -6.74166 and 0.74166?

Answer 25

okay a bit confusing.. but thanks now can you help me out with this one: Solve by using the quadratic formula. Approximate the solutions to the nearest thousandth.
r2 − 9r = 6

Answer 26

yes thats what I got

Answer 27

I think I figured out my problem sorry for all the confusing

Answer 28

well, it may just be because you you added the 6 instead of (-6)

Answer 29

okay, the next one, you'll re-arrange to have something like this
r2-9r-6=0 and use the same formula

Answer 30

yes I will tell you what I get for answers and will u tell me if its correct

Answer 31

okay. i got answers for you when you're done solving

Answer 32

so far I got 9+sqrt(105)/2 and 9-sqrt(105)/2 is that correct?

Answer 33

yes it is

Answer 34

square root of 105 = 10.2470 that right?

Answer 35

yup

Answer 36

14.1235 is that the first answer?

Answer 37

3.8765 the second answer?

Answer 38

thats the part where i get stumped

Answer 39

this what you doing wrong, you supposed to add everything at the top before dividing by 2

Answer 40

9.6235 that the first answer than?

Answer 41

so we'll have 9+10.2470=19.247 then we divide 19.247 by 2 to get the correct answer

Answer 42

that's right

Answer 43

what's your answer for second

Answer 44

thank you are you willing to help me with one more just so i know i am doing these right..

Answer 45

-.6235

Answer 46

is that -0.6235?

Answer 47

yes

Answer 48

can you help me with this one more problem

Answer 49

just so i know what i am doing

Answer 50

send

Answer 51

Solve by using the quadratic formula. Approximate the solutions to the nearest thousandth.
2t2 = 2t + 2

Answer 52

let me try it all and send u the answers

Answer 53

3.2361 and -1.2361

Answer 54

oh crap i know what i did wrong

Answer 55

1.6180 and -0.6180

Answer 56

try again. remember to add or subtract the numerators before dividing at the last end

Answer 57

that's correct. Always ADD or SUBTRACT the top firs before dividing

Answer 58

i got them now. i divided by 2 which suppose to divided by 4

Answer 59

ok. take your time and don't rush it unless it's a multiple choice and you have to guess. good luck.