x^2-2x-16= to what???

is equal to 0

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x^2-2x-16= to what???

is equal to 0

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and by ur equation we have

a = 1

b= -2

c = -16

thus

x={ - (-2) +- √(2² - 4. 1. (-16))} / 2 . 1

=(2 +- √68) / 2

= (2 + 8.246) / 2 , (2 - 8.246) / 2

= 5.123 , 3.123

or just leave it in fractional form with +-√68

x²-2x-16=0

By equation method

a=1

b=-2

c=-16

D=b²-4ac

D=4+64

D=68

√D=2√17

x=-b/2a±√D/2a

2x=2±2√17

x=(1+√17).

or x=(1-√17)