# Difference of squares

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• Mar 31st 2010, 08:59 AM
meshel88
Difference of squares
Use the difference of squares method to factorize 4819.
• Mar 31st 2010, 10:41 AM
Soroban
Hello, meshel88!

Quote:

Use the difference of squares method to factor 4819.

I'm not familiar with the "difference of squares method",
. . but I solved it anyway . . .

I saw that: . $4819 \;=\;4900 - 81 \;=\;70^2 - 9^2$

Therefore: . $4819 \;=\;(70-9)(70+9) \;=\;61\cdot79$

Is that the method?