x ^ { 2 } - m ^ { 2 } - 9 n ^ { 2 } + 6 m n – InterviewSolution

1.

x ^ { 2 } - m ^ { 2 } - 9 n ^ { 2 } + 6 m n

Answer»

x²-m²-9n²+6mn

= x²-(m²+9n²-6mn)= x²-(m²+(3n)²-2(m)(3n))= x²-(m+3n)²= (x-m-3n)(x+m+3n)

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