How do you solve #(x + \frac { 5} { 2} ) ^ { 2} = 81#?

1 Answer
Jim G.
Aug 31, 2017

#x=-23/2" or "x=13/2#

Explanation:

#color(blue)"taking the square root"" of both sides gives"#

#sqrt((x+5/2)^2)=+-sqrt81larr" note plus or minus"#

#rArrx+5/2=+-9#

#rArrx=-5/2-9" or "x=-5/2+9#

#rArrx=-23/2" or "x=13/2#

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