Question 1132558
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{{{b*sqrt(b^2+4h^2) = 100}}}
{{{b^2(b^2+4h^2) = 10000}}}
{{{b^2(b^2+4(10^2)) = 10000}}}
{{{b^4+400b^2 = 10000}}}
{{{b^4+400b^2-10000 = 0}}}<br>
This is a quadratic equation with "b^2" as the variable.  The expression does not factor, so use the quadratic formula to find the value of b^2; then take the square root to find b.