[tex](3n + 2n)(3n - 2n) = [/tex]
[tex] {(3n)}^{2} - {(2n)}^{2} = [/tex]
[tex] {3}^{2} {n}^{2} - {2}^{2} {n}^{2} = [/tex]
[tex]9 {n}^{2} - 4 {n}^{2} = [/tex]
[tex]5 {n}^{2} [/tex]
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[tex](3n + 2n)(3n - 2n) = [/tex]
[tex] {(3n)}^{2} - {(2n)}^{2} = [/tex]
[tex] {3}^{2} {n}^{2} - {2}^{2} {n}^{2} = [/tex]
[tex]9 {n}^{2} - 4 {n}^{2} = [/tex]
[tex]5 {n}^{2} [/tex]