How do you solve #4( x - 9) ^ { 2} = 180#?
1 Answer
May 14, 2018
Explanation:
#"isolate "(x-9)^2" by dividing both sides by 4"#
#rArr(x-9)^2=180/4=45#
#color(blue)"take the square root of both sides"#
#sqrt((x-9)^2)=+-sqrt45larrcolor(blue)"note plus or minus"#
#rArrx-9=+-3sqrt5#
#"add 9 to both sides"#
#rArrx=9+-3sqrt5larrcolor(red)"exact solutions"#
