Whats x^2-2x-2

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x = 1±sqrt(3)

Step-by-step explanation:

x^2-2x-2=0

This polynomial does not factor, so we can use completing the square to solve.

Add 2 to each side

x^2-2x-2+2 =2

x^2 -2x =2

b=-2

We take b/2 and then square it

-2/2 = -1  then square it (-1)^2 =1

Add 1 to each side

x^2 -2x +1 =2+1

The left side is equal to (x+ (b/2) )^2

(x-1) ^2 = 3

Take the square root of each side

sqrt(x-1)^2 = ±sqrt(3)

x-1 = ±sqrt(3)

Add 1 to each side

x-1+1 = 1±sqrt(3)

x = 1±sqrt(3)

the last choice

step-by-step explanation: