Complete the square for the expression, then factor the trinomial. x^2-4x

please explain how to do it as well! :)

Which of the following is the equation that says that the product of a number and ten is equal to 20 percent of that number ? a) 10n= 2.0n b) 10+n=.20n c) n+ .20n=10 d) 10n=0.20n

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project