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(3m + n)(3m-n)?

2007-02-28 03:26:01 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

= 9m² - 3mn + 3mn - n² = 9m² - n²

2007-02-28 04:03:17 · answer #1 · answered by Como 7 · 0⤊ 0⤋

=9m^2-n^2

2007-02-28 13:19:49 · answer #2 · answered by santmann2002 7 · 0⤊ 0⤋

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