Question 1067743
x²+18x=25
x^2+18x+81=25+81, because half of the 18 squared will give a perfect square. Add 81 to both sides
(x+9)^2=106  There is now a perfect square on the left, take the square root of it and move the constant over to the right.  Can check using the quadratic formula.
x+9=sqrt (106)
x=-9+/- sqrt (106)
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