How do you solve #x^2 - 15 = 0#?
1 Answer
May 2, 2018
Explanation:
#"isolate "x^2" by adding 15 to both sides of the equation"#
#x^2cancel(-15)cancel(+15)=0+15#
#rArrx^2=15#
#color(blue)"take the square root of both sides"#
#sqrt(x^2)=+-sqrt15larrcolor(blue)"note plus or minus"#
#rArrx=+-sqrt15#
