find the factors of 486 that we can remove from under the square root sign 2 * 243 2 * 3 * 81 2 * 3 * 9 * 9 (we have 2 nines, we can move a 9 outside the sqrt sign) sqrt(486) = 9 sqrt(6)
Repeating for sqrt(24) 2 * 12 2 * 2 * 6 2 * 2 * 2 * 3 (we can move a 2 outside the sqrt sqrt(24) = 2 sqrt(6)