Respuesta :

Step-by-step explanation:

x

2

−11x+28=0

We have a formula for solving quadratic equation ax

2

+bx+c=0 is

x=

2a

−b±

b

2

−4ac

x=

2

11±

121−112

x=

2

11±

9

x=

2

11±3

x=

2

11−3

;x=

2

11+3

x=

2

8

;x=

2

14

x=4,7

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