Using a2 − b2 = (a + b) (a − b), find 512 − 492

512 − 492 = (51 + 49) (51 − 49) = (100) (2) = 200

Using Asquare2 − Bsquare2 = (A + B) (A − B), Find 51square2 − 49square2

Using a²− b² = (a + b) (a − b), find 51² − 49²

51² − 49² = (51 + 49) (51 − 49)

= (100) (2) = 200

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