Question 613935
The roots are 
{{{ x = 1 }}}
{{{ x = -6 }}}
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Now rewrite these as
{{{ x - 1 = 0 }}}
{{{ x + 6 = 0 }}}
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Now express the product:
{{{ ( x-1 )*( x + 6 ) = 0 }}}
{{{ x^2 -x + 6x - 6  = 0 }}}
{{{ x^2 + 5x - 6 = 0 }}}
The function is:
{{{ f(x) = x^2 + 5x - 6 }}}
Here's a plot:
{{{ graph( 400, 400, -10, 10, -16, 5, x^2 + 5x - 6 ) }}}