Question 813799
graphically {{{y=4x^2}}} and {{{xy=-10}}}


Like y=x^2 but narrower; and the other equation is a hyperbola.
You would expect in symbols, to be able to say {{{x(4x^2)=-10}}}, 
{{{4x^3=-10}}}
{{{x^3=-10/4}}}
{{{x^3=-5/2}}}
{{{x=root(3,-5/2)=-1.357}}} approximately,
which means {{{y=4((-5/2)^(1/3))^2}}}, {{{y=4(-5/2)^(2/3)=7.368}}} approximately.


{{{graph(350,350,-9,9,-9,9,4x^2,-10/x)}}}