Question

can I get more help with this problem? 10-x^2-3x/x^2+2x-8. The directions say, "Simplify," then it gives the problem, then it says, "Identify any x-values for which the expression is undefined. Anyone?

Answer 1

ok first u have to factor the numerator and the denominator... (can u do that?)

Answer 2

(-x+2)(x+5)/(x+4)(x-2)

Answer 3

x not= -4 and 2

Answer 4

yes...

Answer 5

aroub, i can factor

Answer 6

doing it now

Answer 7

hang on

Answer 8

okay

Answer 9

(-x-2)(x-5)/(x-2)(x+4)

Answer 10

yes but it suppose to be +5

Answer 11

but then i get -10

Answer 12

instead of -x^2-3x+10

Answer 13

yes , -(x^2+3x-10) , u put the negative outside..

Answer 14

oh. ok. so now i have -(x-2)(x-5)/(x-2)(x+4)
now what?

Answer 15

oops. (x+5)

Answer 16

ah! ok at the moment we dont care abt the numerator, look at the denominator u have (x-2)(x+4)

Answer 17

(x-2) <--- what number u add or subtract it eaquals to zero??

Answer 18

(x-2)? i dont know :/

Answer 19

equals* / think.. , ok solve it x-2=0

Answer 20

x=2

Answer 21

yes! :)

Answer 22

ok now the next one (x+4)

Answer 23

x=-4

Answer 24

yes!

Answer 25

ok greeaatt! so did u get it??

Answer 26

ok so do i replace (x-2) with 2?

Answer 27

ok wait.. ur question is asking that "Identify any x-values for which the expression is undefined" so u have to write 2 and -4

Answer 28

so would i change -(x-2)(x+5)/(x-2)(x+4) to -2*-5/2*-4?

Answer 29

no..

Answer 30

x is not equal 2 and x is not equal to -4 ( i wanted to write the not equal sign but the equation box is not working..! :(

Answer 31

oh! ok. got it. thank you so much :)

Answer 32

hehehe okay! no probblleemm!!!!!! :D ;D