Solve equation with the quadratic formula. round decimals to the nearest thousandth.

4x^2=48+4x

List the 10 possible samples (without replacement) of size 3 3 that can be obtained from the population of five officials.

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).