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Question
8 which expression is equivalent to 4∛(-16x⁵) in simplest radical form? a -8x b -8x²∛(2x) c -8x² d -8x∛(2x²)
Step1: Factorizar -16x^5
Podemos escribir -16x^5 como -8 2 x^3 * x^2. Entonces, 4\sqrt[3]{-16x^5}=4\sqrt[3]{-8x^3\cdot2x^2}.
Step2: Aplicar la propiedad del radical \(\sqrt[3]{ab}=\sqrt[3]{a}\cdot\sqrt[3]{b}\)
4\sqrt[3]{-8x^3\cdot2x^2}=4\sqrt[3]{-8x^3}\cdot\sqrt[3]{2x^2}.
Step3: Simplificar \(\sqrt[3]{-8x^3}\)
Sabemos que \(\sqrt[3]{-8x^3}=- 2x\) ya que (-2x)^3=-8x^3. Entonces, 4\sqrt[3]{-8x^3}\cdot\sqrt[3]{2x^2}=4\times(-2x)\sqrt[3]{2x^2}.
Step4: Realizar la multiplicación
4\times(-2x)\sqrt[3]{2x^2}=-8x\sqrt[3]{2x^2}.
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D. -8x\sqrt[3]{2x^2}