Question

add simplify if possible:
7/y-1 + 4/(y-1)^2 =

Answer 1

what is a common denominator equal to ?

Answer 2

not understanding your question

Answer 3

do you know the definition of numerator and denominator?
what is the common denominator means?

Answer 4

the denominators are y-1 and y-2^2

Answer 5

so, to be able to add two fractions you need COMMON denominator, right?
what is the common denominator in this case?

Answer 6

correction y-1 and y-1^2

Answer 7

i got that... happens sometime

Answer 8

y=-2

Answer 9

so, one fraction has denominator:
(y-1)
another:
(y-1)^2, which is = (y-1)*(y-1)
right?

Answer 10

break them down into 2 equeations: 7/y-1 abd 4(y-1)^2

Answer 11

no

Answer 12

ok then what this stuff is new to me

Answer 13

common demonotator for 7/y-1 is y. since y x 1 is 1y they cancel out so its just 7

Answer 14

=\[=[7(y-1) +4]/(y-1)^{2}=(7y-3)/(y-1)^{2}\]

Answer 15

when you have a number before the bracketsd it means you have to multiply every number by that number so it would be (4y-4)^2

Answer 16

so its (4y-4)(4y-4) and you should know it from there

Answer 17

biljana92000 ... what are you talking about...?
unless I'm reading the original problem wrong.
jazi1, please check the problem & let me know if this is right:
\[7/(y-1) +4/(y-1)^{2}=...\]

did i read it wrong?

Answer 18

that's correct inik but the first y-1 is not in parenthese

Answer 19

do you mean its 7 divided by y after that -1
or 7 divided by (y-1)?

Answer 20

it just like you have but the first (y-1) is not in parenthese but the second one (y-1)^2 is

Answer 21

again, parentheses or not - different people on web using shortcuts in writing problems & it's OK .
I just trying to understand which problem you are trying to solve... it will have VERY different results
1) \[7/y +4/(y-1)^2 -1\] (I change the order just to see better the problem)
2)\[7/(y-1) +4/(y-1)^2\]

which means that 7 is divided by y-1, not by1which one is your problem - 1st or 2nd?

Answer 22

if second - you already have the answer above
if first... I'll post it

Answer 23

7/(y-1) + 4/(y-1)^2

Answer 24

so inik the answer is -2