( 3x) ² + 2 * 3x * 2 +2²
9x² +2*3x*2+2²
9x²+12x+2²
9x²+12x+4
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( 3x) ² + 2 * 3x * 2 +2²
9x² +2*3x*2+2²
9x²+12x+2²
9x²+12x+4