Simplify $2 \sqrt[3]{50x^2 z^5} × 3 \sqrt[3]{15 y^3 z}$ Image of problem
As you can see the answer is $30 y z^2 \sqrt[3]{6x^2}$ . I understand mostly everything in the problem, but one thing that I am having confusion on is where the "30" came from in the answer. I tried many ways to find out how the "30" got there.

You have:
$$6 \sqrt[3]{5^2\cdot 2 \cdot x^2 \cdot z^5 \cdot 3 \cdot 5 \cdot y^3 \cdot z} = 6 \sqrt[3]{5^3\cdot 6 \cdot x^2 \cdot z^6  \cdot y^3} = 30 \cdot y \cdot z^2  \sqrt[3]{ 6 \cdot x^2} $$
I hope its clear now.
