Question

Rezolvati:
$17^{2} -(x+9) ^{2} = 10^{2} - x^{2}$

Answer 1

Salut,

Din enunţ avem că:

$289-x^2-18x-81=100-x^2\Rightarrow -18x=181-289\Rightarrow\\\\\Rightarrow-18x=-108\Rightarrow x=\dfrac{-108}{-18}=6.\;Deci\;x=6.$

Green eyes.