Question 557718
{{{ 8*sqrt(x) = -x }}}
square both sides
{{{ 64x = x^2 }}}
{{{ x^2 - 64x = 0 }}}
{{{ x*( x - 64 ) = 0 }}}
{{{ x = 0 }}}
{{{ x = 64 }}}
It looks like there are 2 real solutions:
You have to take the negative square root
in the equation {{{ 8*( -sqrt(64)) = -64 }}}
{{{ 8*(-8) = -64 }}}
{{{ -64 = -64 }}}
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If only the (+) square root is allowed, then
{{{ x = 0 }}} is the only answer