Question

completeing the square: x^2-10x-5=9

Answer 1

You first get the constant numbers to the opposite side of the x^2, so get the -5 to the other side.

Answer 2

x^2 - 10x = 14

do you understand this, so far?

Answer 3

got it!!!!!! thank you so much!

Answer 4

what did you get for an answer?

Answer 5

x=+- square root of 39?

Answer 6

x=5+_ square root of 39

Answer 7

x^2 - 10x + 25 = 14 + 25
(x - 10)^2 = 39
x - 10 = +-sqrt(39)
x = +- sqrt(39) + 10

Answer 8

whered you get the 10 from?

Answer 9

it factors to (x-5)^2

Answer 10

OOPS you are correct....

Answer 11

haha no worries

Answer 12

but then you need to add 5 to both sides...

x = +-sqrt(39) + 5

sorry I was texting and doing math at the same time.

Answer 13

blexting can you help with a few more questions?

Answer 14

Sure

Answer 15

M: 2/m + 3/m+9= 11/4

Answer 16

You need to find a common denominator..
is the + 9 in the denominator or all by itself?

Answer 17

m+9

Answer 18

So the denominators are m and m + 9 and 4
so your common denominator is 4m(m+9)

do you agree?

Answer 19

yes i agreee!!!

Answer 20

so we multiply everything by that correct?

Answer 21

top and bottom?

Answer 22

8(m+9)+12m =......

Answer 23

Because you have denominators and an equal sign. you need to multiply each term by your common denominator.

4m(m+9)*2/m + 4m(m+9) * 3/(m+9) = 4m(m+9)*11/4

Answer 24

Cancel the denominators into the numerators

Answer 25

4(m+9)*2 + 4m*3 = m(m+9)*11

Answer 26

8(m+9) + 12m = 11m(m+9)

Answer 27

8m + 72 + 12m = 11m^2 + 99m

Answer 28

Because you have an equal sign and an x^2 term you need to put the other side = to 0.

Answer 29

0 = 11m^2 + 79m - 72

Answer 30

I would use the quadratic formula here..

Do you agree with my steps so far?

Answer 31

0 = (11m + 9)(m +8)

m = -9/11 or -8

sorry it factors.

Answer 32

im confuseddd ahhhhhhh i got 10.5

Answer 33

i think i got it!

Answer 34

omg got it!

Answer 35

Great...

Answer 36

i <3 you

Answer 37

wanna be our math tutor for the night?
i have another problem :D

Answer 38

Sure... for awhile.