How do you solve #x^2-2=7#?
1 Answer
Nov 3, 2016
Explanation:
The first step is to add 2 to both sides of the equation, thus isolating the
#x^2# term on the left side.
#x^2cancel(-2)cancel(+2)=7+2#
#rArrx^2=9# Take the
#color(blue)"square root "# of both sides.
#sqrt(x^2)=+-sqrt9#
#rArrx=+-3#
