Question

(4)/(x+4)-(7)/(x-2)....i know the answer is (-3)(x+12)/(x+4)(x-2) but what are the steps?

Answer 1

just take l.c.m and u wil get the answer

Answer 2

i know the answer i just dont know the steps to get the answer

Answer 3

apply l.c.m rule

Answer 4

but then we come up with 28 and its not anywhere near the answer

Answer 5

you start w/ different denominators to get a common denominator with binomials multiply them together
(x+4)(x-2)
For first fraction you added (x-2) so multiply the top by (x-2)
4*(x-2)
For 2nd fraction you added (x+4) so multiply top by (x+4)
7*(x+4)
this gives
4(x-2) - 7(x+4) all over (x+4)(x-2)
distribute on top and add like terms
4x-8-7x-28
=-3x-36
factor out a -3
=-3(x+12)
this is still all over (x+4)(x-2)

hope that helps

Answer 6

u wil get it by l.c.m ,
4(x-2)-7(x+4) whole divided by (x-2)(x+4)
(4x-8-7x-28) whole divided by(x-2)(x+4)
(-3x-36) whole divided by (x-2)(x+4)
u take -3 common from numerator u wil get u r answer