Question

√(x+2)+4=x

Answer 1

i know it would turn to x+2=x-4 but idk what to do next

Answer 2

is this sqrt sign applicable to all terms?

Answer 3

only to the parenthesis like \[\sqrt{x+2}+4=x\]

Answer 4

oh..okay

Answer 5

so after x+2=x-4 what do i need to do?

Answer 6

how did you got x+2=x-4?

Answer 7

i squared the one side and honestly i dont know how i came up with the x-4 i guess i just moved the 4 to the other side and changed signs

Answer 8

no no no...

Answer 9

I have the answer will you listen?

Answer 10

yeah

Answer 11

you got root(x+2)=x-4

Answer 12

you mean \(\sqrt{x+2} = x-4 \)
now square both sides.
and for, \((x-4)^2\)
use the formula \((a-b)^2=a^2-2ab+b^2\)

Answer 13

ok

Answer 14

isnt it?

Answer 15

yeah i was agreeing

Answer 16

square both sides

Answer 17

x+2=x-4^2

Answer 18

x+2=x^2-8x+16

Answer 19

ok?

Answer 20

how did you get that?

Answer 21

(a-b)^2=a^2-2ab+b^2

Answer 22

thats confusing

Answer 23

that is the expansion of (a-b)^2

Answer 24

ooh ok i got it now after looking at it for a bit

Answer 25

(x-4)^x^2-(2*x*4)+4^2

Answer 26

k..

Answer 27

yeah

Answer 28

x+2 to the RHS

Answer 29

RHS?

Answer 30

right side?

Answer 31

0=\[x^2-8x+16-x-2\]

Answer 32

yes

Answer 33

ok

Answer 34

Right Hand Side=RHS

Answer 35

ive never seen any one abbreviate that before

Answer 36

0=\[x^2-9x+14\]

Answer 37

ok

Answer 38

now do you know how to factorize?

Answer 39

can you give me an example? im not sure

Answer 40

or the formula for qudriatic equations?

Answer 41

ok i will give an example of factorizing..

Answer 42

x^2+3x+2 can be factorized as (x+1)(x+3)

Answer 43

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

Answer 44

cool...use it now

Answer 45

you need to understand how to factorize for doing this faster

Answer 46

got the answer?7 or 2

Answer 47

i got 7

Answer 48

or 2

Answer 49

its plus or minus

Answer 50

yeah i got that sorry

Answer 51

you need to know hw to factorize..I will show you how this should be done here

Answer 52

ok

Answer 53

here you have x^2-9x+14

Answer 54

which two numbers give 14 when multiplied and gives (-9) when added?

Answer 55

-7 and +2

Answer 56

-7 and -2

Answer 57

oh right

Answer 58

so the factorized form is (x-7)*(x-2)=0

Answer 59

so for this to be zero either x=7 or x=2..

Answer 60

you got it?

Answer 61

yes

Answer 62

thank you i actually knew that i just forgot over summer

Answer 63

hahaha..Happens to me often..I get blank after summer:)