I assume you mean;

16X^2 -88X + 121 = 0

even if you did not I am not going to factor that monster, but use the quadratic formula

discriminant: (-88)^2 - 4(16)(121)

= 7744 - 7744 = 0

one real root indicated, next

X = - b (+/-) sqrt(b^2-4ac)2a

a = 16

b = -88

c = 121

X = - (-88) (+/-) sqrt[(-88)^2 - 4(16)(121)]/2(16

X = 88 (+/-) sqrt(7744 - 7744)/32

X = 88/32

X = 11/4

which is 2.75

16X^2 -88X + 121 = 0

even if you did not I am not going to factor that monster, but use the quadratic formula

discriminant: (-88)^2 - 4(16)(121)

= 7744 - 7744 = 0

one real root indicated, next

X = - b (+/-) sqrt(b^2-4ac)2a

a = 16

b = -88

c = 121

X = - (-88) (+/-) sqrt[(-88)^2 - 4(16)(121)]/2(16

X = 88 (+/-) sqrt(7744 - 7744)/32

X = 88/32

X = 11/4

which is 2.75