Problemas aprendiendo a sumar

1.

1. 0[pic 1]

R=  ( x+ 7) 2 = 1000

       x + 7 =+-31.62

       x= 31.62 -7 = 24.62

       x=-31.62 – 7 =-38.62

S {24.62, -38.62}

1. [pic 2]

R=  ( x+ 6) 2 = 169

       x + 6 =+-13

       x= 13 -6 = 7

       x=-13 – 6 =-19

S {7,-19}

1. 1 = 90[pic 3]

R=  ( x+ 1) 2 = 90

       x + 1 =+-9.48

       x= 9.48 -1 = 8.48

       x=-9.48 – 1 =-10.48

S {8.48, -10.48}

1.  = 16[pic 4]

R=  ( x+ 5) 2 = 16

       x + 5 =+-4

       x= 4 -5 = -1

       x=-4 – 5 =-9

S {-1, -9}

1.  = 23[pic 5]

R=  ( x+ 3) 2 = 23

       x + 3 =+-4.8

       x= 4.8 -3 = 1.8

       x=-4.8 – 3 =-7.8

S {1.8,-7.8}

1. 64 = 54[pic 6]

R=  ( x+ 8) 2 = 54

       x + 8 =+-7.35

       x= 7.35 -8 = -0.65

       x=-7.35 – 8 =-15.35

S {-0.65,-15.35}

1. 121 = 90[pic 7]

R=  ( x- 11) 2 = 90

       x - 11 =+- 9.48

       x= 9.48 + 11 = 20.48

       x=-9.48 + 11 =1.52

S {20.48, 1.52}

1. 144 = 29[pic 8]

R=  ( x+ 12) 2 = 29

       x + 12 =+-5.38

       x= 5.38 -12 = -6.62

       x=-5.38 – 12 =-17.38

S {-6.62,-17.38}

1.  81=  2526[pic 9]

R=  ( x- 9) 2 = 2526

       x - 9 =+-50.25

       x= 50.25 + 9 = 59.25

       x=-50.25 +9 =-41.25

S {59.25,-41.25}

1. 9 = 62.7[pic 10]

R=  ( x- 3) 2 = 62.7

       x - 3 =+-7.92

       x= 7.92 +3 = 10.92

       x=-7.92 + 3 =-4.92

S {10.92, -4.92}

2.

a) l x-91 l = 25

   R. x -91 = +-25

       x = 25 + 91 = 116

       x = -25 + 91 = 66

  S= {116, 66}

b) l x- 12 l = 82

   R. x -12 = +-82

       x = 82 +12 = 94

       x = -82 + 12 =- 70

  S= {94,- 70}

C) ( x + 26 ) 2 = 256

   R. x + 26 = +-16

       x = 16 - 26 = -10

       x = -16 - 26 =- 42

  S= {-10, -42}

d) l x – 0.06 l = 0.09

 R. x -0.06 = +-0.09

       x = 0.09 +0.06 = 0.15

       x = -0.09 + 0.06 =- 0.03

  S= {0.15, -0.03}

e)  l 4x + 2 l = 12

  R. 4x + 2 = +-12

      x= 12 – 2 / 4 = 2.5

      x=-12 -2 / 4 = -3.5

...