Respuesta :

Hrishii

Answer:

x = 14

Step-by-step explanation:

  • By tangent secant theorem

  • [tex] x^2 = 7(7+21)[/tex]

  • [tex]\implies x^2 = 7(28)[/tex]

  • [tex]\implies x ^2=196[/tex]

  • [tex]\implies x=\pm\sqrt{196}[/tex]

  • [tex]\implies x=\pm 14[/tex]

  • x can not be negative

  • [tex]\implies x=14[/tex]

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