Question

simplify 2^3√40+3^3√625-4^3√320​

Answer 1

Step-by-step explanation:

${2}^{3} \sqrt{40} + {3}^{3} \sqrt{625} - {4}^{3} \sqrt{320} \\ = 16 \sqrt{10} + 27 \times 25 - 64 \times 4 \sqrt{20} \\ = 16 \sqrt{10} - 512 \sqrt{5} + 675$

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