Question 700705
The zeros are the values of {{{ x }}}
for which {{{ h(x) = 0 }}}
{{{ x^2 + 26 + 120 = 0 }}}
By looking at this I see
{{{ ( x + 6 )*( x + 20 ) = 0 }}}
For this to be true, either
{{{ x = -6 }}} or
{{{ x = - 20 }}}
These are the poles of the equation
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Here is a plot of the equation:
{{{ graph( 600, 400, -25, 5, -50, 10, x^2 + 26x + 120 ) }}}