Radical exponents
posted by Ava .
Use rational exponents to write 4suare root 5 * 2 sqaure root 8
Please help.. I can't find the square root button

The subject is rational (fractional) exponents, not radical.
4sqrt5 * 2 sqrt8 = 8 sqrt40
= 8 sqrt(4*10) = 16 sqrt10
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