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Mathematics 4 Online
OpenStudy (anonymous):

(√3-√5)(√3+√5)

OpenStudy (pottersheep):

3 - 5 = 2!

OpenStudy (pottersheep):

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

OpenStudy (pottersheep):

It's called difference of squares

OpenStudy (pottersheep):

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

OpenStudy (anonymous):

can you help me solve this

OpenStudy (pottersheep):

The answer would be 2

OpenStudy (anonymous):

how would i show my work

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