- #1

- 38

- 0

## Homework Statement

9 - 9y

^{-2}

____________

y

^{-1}- y

^{0}

**this whole thing is then raised to 2**(I can't seem to format it that way:( )

## Homework Equations

none

## The Attempt at a Solution

I'm hoping someone would guide me through this :(

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- Thread starter haengbon
- Start date

- #1

- 38

- 0

9 - 9y

____________

y

none

I'm hoping someone would guide me through this :(

- #2

Pengwuino

Gold Member

- 4,989

- 16

- #3

- 38

- 0

yes xD !

- #4

Pengwuino

Gold Member

- 4,989

- 16

- #5

HallsofIvy

Science Advisor

Homework Helper

- 41,833

- 963

## Homework Statement

9 - 9y^{-2}

____________

y^{-1}- y^{0}

[tex]\left(\frac{9- 9y^{-2}}{y^{-1}- y^{0}}\right)^2[/tex]

[tex]\left(9\frac{1- \frac{1}{y^2}}{\frac{1}{y}- 1}\right)^2[/tex]

Multiply both numerator and denominator by [itex]y^2[/itex].

this whole thing is then raised to 2(I can't seem to format it that way:( )

## Homework Equations

none

## The Attempt at a Solution

I'm hoping someone would guide me through this :(

- #6

- 38

- 0

[tex]\left(\frac{9- 9y^{-2}}{y^{-1}- y^{0}}\right)^2[/tex]

[tex]\left(9\frac{1- \frac{1}{y^2}}{\frac{1}{y}- 1}\right)^2[/tex]

Multiply both numerator and denominator by [itex]y^2[/itex].

I can't seem to understand why both the numerator and denominator needs to be multiplied by y

- #7

Mark44

Mentor

- 34,867

- 6,600

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