Simplify (3x+2y)²+(3x-2y)² – InterviewSolution

1.

Simplify (3x+2y)²+(3x-2y)²

Answer»

$= {(3x + 2y)}^{2} + {(3x - 2y)}^{2} \\ = 9 {x}^{2} + 4 {y}^{2} + 12xy + 9 {x}^{2} + 4 {y}^{2} - 12xy \\ = > 18 {x}^{2} + 8 {y}^{2}$

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