Try another version of this question Get help: Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Multiply and Simplify.
`2 sqrt(3)(5 sqrt(15)-sqrt(21))` =
Enter DNE for Does Not Exist, oo for Infinity `30 sqrt(5)-6 sqrt(7)`