purpleunicorns105
purpleunicorns105 purpleunicorns105
  • 20-05-2021
  • Mathematics
contestada

NEED DONE ASAP!!
Solve. Show your steps
A.3x2 + 4 = 52
B.x2 - 121 = 0
C.(b + 4)2 = 49

Respuesta :

birungjoel
birungjoel birungjoel
  • 20-05-2021

Answer:

A. 3x^2 + 4 = 52

     3x^2 = 52 - 4

     3x^2 = 48

       x^2 = 48/3

       x^2 = 16

        x    = [tex]\sqrt{16}[/tex]

        x = 4

B. x^2 - 121 = 0

     x^2  = 121

       x = [tex]\sqrt{121}[/tex]

       x = 11

C. (b + 4 )2 = 49

    2b + 8 = 49

    2b  = 49 - 8

     2b = 41

        b = 41/2

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