Question

Me ajudem!!!!!!!!!!!!!!

Answer 1

( X + 1 )² = 7 + X

X² + 2X + 1 = 7 + X

X² + 2X - X + 1 - 7 = 0

X² + X - 6 = 0

X = - 1 +-√1 + 24
     --------------------
               2

X = - 1+-√25
     -------------- 
            2

X' = - 1+5      X' = 4/2 → X' = 2
       ---------
           2

X" = - 1 - 5     X" = - 6/2 → X" = - 3
        --------- 
            2

Answer 2

x^2+1=7+x
x^2-x=7-1
x=6