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

please explain how to do it as well! :)

Listed below are the measured radiation absorption rates? (in w/kg) corresponding to 11 cell phones. use the given data to construct a no plot and identify the 5- number summary

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20