Answer:
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Step-by-step explanation:
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[tex]\left(x^{\tfrac 1 2} -x \right) - \left( 2x^3 - x^{\tfrac 12} -x \right)\\\\=x^{\tfrac 12} -x-2x^3 + x^{\tfrac 12} +x\\\\=2x^{\tfrac 12} -2x^3\\\\=2\left(x^{\tfrac 12} - x^3 \right)[/tex]
