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Use One of the Appropriate Patterns (a+b)2=a2+2ab+b2( a + b ) ^ { 2 } = a ^ { 2 } + 2 a b + b ^ { 2 }

Question 308

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Use one of the appropriate patterns (a+b)2=a2+2ab+b2( a + b ) ^ { 2 } = a ^ { 2 } + 2 a b + b ^ { 2 } ; (a−b)2=a2−2ab+b2( a - b ) ^ { 2 } = a ^ { 2 } - 2 a b + b ^ { 2 } ; (a+b)(a−b)=a2−b2( a + b ) ( a - b ) = a ^ { 2 } - b ^ { 2 } to find the following product. (3+9n)(3−9n)( 3 + 9 n ) ( 3 - 9 n )

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