How do you solve #\frac { x ^ { 2} } { 2} - 14= 18#?
1 Answer
Jul 20, 2017
Explanation:
#"add 14 to both sides of the equation"#
#x^2/2cancel(-14)cancel(+14)=18+14#
#rArrx^2/2=32#
#"multiply both sides by 2"#
#cancel(2)^1xx x^2/cancel(2)^1=2xx32#
#rArrx^2=64#
#color(blue)"take the square root of both sides"#
#sqrt(x^2)=+-sqrt64larr" note plus or minus"#
#rArrx=+-8#
