Using the quadratic formula to solve x2 = 5-x, what are the values of x?

its the first choice, negative 1 plus or minus square root of 21 over 2

Step-by-step explanation:

A) (-1 ± √21)/ 2

Step-by-step explanation:

Move all terms onto one side

          = 5-x

+ x - 5 = 0

Insert values into quadratic formula

a = 1      b= 1     c= - 5

[-b ± √( - 4ac)]/2a

[-1 ± √( - 4 (1(-5)]/ 2(1)

(-1 ± √21)/ 2

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step-by-step explanation:

put up a picture so people can you

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!