Determine $(r + s)(s + t)(t + r),$ if $r,$ $s,$ and $t$ are the three real roots of the polynomial $x^3 + 9x^2 - 9x - 8.$
<|im_start|>system
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<|im_start|>user
Determine $(r + s)(s + t)(t + r),$ if $r,$ $s,$ and $t$ are the three real roots of the polynomial $x^3 + 9x^2 - 9x - 8.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
73
Determine $(r + s)(s + t)(t + r),$ if $r,$ $s,$ and $t$ are the three real roots of the polynomial $x^3 + 9x^2 - 9x - 8.$
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