What are the solution to the quadratic equation x2-16=0?

The solutions are x = 4 and x = -4add 16 to both sides so you have x2 = 16then take the square root of both sides so you have x = 4 and -4 because square roots are + and -

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.