Resposta:
D) 4x²- x⁴
[tex] \frac{ {2x}^{4} - {5x}^{6} + {6x}^{4} + {3x}^{6} }{ {2x}^{2} } = \frac{ {x}^{2}x( {2x}^{2} - {5x}^{4} + {6x}^{2} + {3x}^{4})}{ {2x}^{2} } = \\ \\ \frac{ {2x}^{2}- {5x}^{4} + {6x}^{2} + {3x}^{4} }{2} = \frac{ {8x}^{2} - {5x}^{4} + {3x}^{4} }{2} = \\ \\ \frac{ {8x}^{2} - {2x}^{4} }{2} = \frac{2( {4x}^{2} - {x}^{4})}{2} = {4x}^{2} - {x}^{4} [/tex]
