Factor -p^2 q^2 + 81

[mrolive]

Factor -p^2 q^2 + 81

Since all the terms can be squared, how do I go about solving this?

 

[Deleted member 4993]

mrolive Factor -p^2 q^2 + 81

Since all the terms can be squared, how do I go about solving this?

a^2 - b^2 = (a+b) * (a-b)

 

[mrolive]

a^2 - b^2 = (a+b) * (a-b)

Sorry but could you explain it in detail if you have the time. I'm not sure what a^2 - b^2 = (a+b) * (a-b) means...

 

[Deleted member 4993]

Sorry but could you explain it in detail if you have the time. I'm not sure what a^2 - b^2 = (a+b) * (a-b) means...

For a quick review, go to:

http://www.purplemath.com/modules/specfact.htm

 

[mrolive]

Hmmm...that basic stuff: teacher absent?

No just a dumb mistake on my part. I was looking at it as if there were 3 terms in the equation :/

 

[pka]

Since all the terms can be squared, how do I go about solving this?

$\displaystyle -p^2q^2+81=81-p^2q^2$ That is the difference of two squares.