Question 130764
x^2-16x=10
x^2-16x+64=10+64 take (-16/2=-8) and square it (64) and use it as the third number. (completing the square. 
(x-8)^2=74
x-8=+-sqrt(74) Sqrt of both sides
x=8+-sqrt(74)
x=8+sqrt(74), x=8-sqrt(74)
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Ed