Question

simplify 10-x^2-3x/x^2+2x-8
identify any x-values for which the expression is undefined.

how do i start?

Answer 1

simplify first

Answer 2

(-3x+5)(x+2)

Answer 3

over

Answer 4

(x+4)(x+2)

Answer 5

x+2 cancels out

Answer 6

-3x+5/x+4

Answer 7

x canot be -4 and -2

Answer 8

TADA!!!!!!!!!

Answer 9

x^2+3x-10/x^2+2x-8
(x-2)(x+5)/(x-2)(x+4)
(x+5)/(x+4)
x is not equal to -4

Answer 10

umm also -2 because if it was expression would be 0

Answer 11

i mean undfined

Answer 12

yes ur right but 2 not -2

Answer 13

and aroub if u multiply by -1 u goota do it on top and bottom

Answer 14

i didnt i just factored the numerator and the denominator and then simplified x-2 with x-2

Answer 15

did u do the same??

Answer 16

but i thought it was -x^2 and +10

Answer 17

oh yea it is i just reordered them ...

Answer 18

but if u multiply top u gottta do it to bottom

Answer 19

the answer is -x-5/x+4

i just dont know how to get to it

Answer 20

oh crap i did something wrong aroub was right

Answer 21

i dont understand how ya'll are simplifying it.

hahd: (-3x+5)(x+2) doesnt go back to 10-x^2-3x
aroub: (x-2)(x+5) doesnt either....

Answer 22

i get x^2+3x-10 with (x-2)(x+5)

Answer 23

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

Answer 24

perfect

Answer 25

ok thnkx

Answer 26

wait! wait! wait!

what do i do now that i have this:

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

Answer 27

ok after this, for the numerator u have to put the negative sign outside in order to simplify with denominator.. like this---> -(x-2)(x+5) so u cancel x-2 with x-2 and u get -x+5/x+4