15 does.
4
4
2 times 30 equals 60.
10 times 6 = 60 or 12 times 5 = 60 pr 15 times 4 = 60 or 20 times 3 = 60 or 30 times 2 = 60
Since 60 can be factored to 4 times 15, then radical 60 equals 2 times radical 15.
15 and -4
"Wat" is the variable.
negative 60
x=-60
15 multiplyed by 4 equals exactly 60.
x=60, x/4=15, times both sides by 4, x=60