Answer:
To find the product of (-2√20k)(5√8k^3), we can use the rule for multiplying radicals, which states that to multiply two radicals, we can multiply the numbers outside the radicals and the numbers inside the radicals separately. Applying this rule, we get:
(-2√20k)(5√8k^3) = (-2)(5) √(20k)(8k^3)
= -10 √(160k^4)
This expression is equivalent to the given product.
Explanation: