alexislillianfpawlf8
alexislillianfpawlf8 alexislillianfpawlf8
  • 20-12-2018
  • Mathematics
contestada

Please help me. How do you do this.

Please help me How do you do this class=

Respuesta :

gmany
gmany gmany
  • 28-12-2018

Use the Pythagorean theorem:

[tex]x^2+4^2=10^2[/tex]

[tex]x^2+16=100[/tex]        subtract 16 from both sides

[tex]x^2=84\to x=\sqrt{84}\\\\x=\sqrt{4\cdot21}\\\\x=\sqrt4\cdot\sqrt{21}\\\\\boxed{2\sqrt{21}}[/tex]

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