what is the answer to these 3 problems? does anyone know? they're the only ones that i dont know out of 35...

Question

1. simplify the expression:
(2/x-6)+4x

2. simplify the expression:
(c/b)-(c/abc)

3. simplify:
(23/3xy)-(1/3xy^5)

thank you!

Answer 1

1.-2(x-1)/x
2.(ac-1)/ab
3.(-x^2y^5 +23)/3xy

Answer 2

1. multiply by x /x and factor.
2. multiply by abc/abc and simplify.
3. multiply by 3xy^5/3xy^5 and factor

This is all LCD stuff (least common denominator)... All we are doing is multiplying by one, so we don't have to play games with anything within any other parts of the equation/exporession...

What is ((2x-6)+4x) times one? Isn't x/x = 1?

Ron.

Answer 3

1. simplify the expression:
(2/x-6)+4x

2/x - 6 + 4x =
2 - 6x + 4x^2 =
4x^2 - 6x + 2 =
(4x - 2)(x - 1)

2. simplify the expression:
(c/b)-(c/abc)

(ac^2)/(abc) - c/(abc) =
(ac^2 - c)/(abc) =
(c(ac - 1)/(abc) =
(ac - 1)/(abc)

3. simplify:
(23/3xy)-(1/3xy^5) =
(23y^4)/(3xy^5) - 1/(3xy^5) =
(23y^4 - 1)/(3xy^5)

Answer 4

(2/x-6)+4x
= 2/x -6x/x + 4x^2/x = (2-6x+4x^2)/x

2. (c/b)-(c/abc) = ac^2/abc -c/abc = (ac^2-c)/abc
= c(ac-1)/abc

3. (23/3xy)-(1/3xy^5)
= 23 y^4/3xy^5 - 1/ 3xy^5 = 22/3xy^5

Answer 5

They don't look like you can simplify them do they?

But you can factor out terms, the first is a second degree equation, you can factor it, the third is 23y^4-1 you can factor this (if you must), there isn't much you CAN do with these...

Answer 6

We will only help you if you have only ONE problem per question! Three problems on one question is CHEATING!!!!