Question

Na figura a cima o valor de x é:

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Answer 1

$b^2=20^2+15^2\\b=\sqrt{625} \\ b=25\\\\ 25^2=x^2+2x^2\\ 625=3x^2\\3x^2-625=0\\\\x=0+\sqrt{0-4*3*(-625)} /2*3\\x=5\sqrt{3} /6$